More Dooks ferret food chart

This information was not created by me but is the best I have found.  More Dooks' site is unstable so we copied it here.
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Summary
This chart mathematically rates dry ferret, cat, and kitten foods. 
Keep in mind that it is impossible to determine the exact quality or meat content of a food from just the information that is required to be on its label. The best we can do with the bit of information we get is approximate (or look at foods that provide meat content claims). 

This chart rates foods by assessing the amount of protein and fat they contain, and then scoring the quality of their main sources. It also penalizes high amounts of carbohydrates (such as vegetables and sweeteners). 

The Exact Math (feel free to skip if you're lazy) 
We award equal points to both protein and fat being as high as possible. Each percent that is in the food earns 0.51 points. The first 6 ingredients are rated on a weighted scale (meaning points are more greatly affected by ingredients that are higher on the list): 

+6 for the first ingredient, +5 for the second, +4 for the third, +3 for the fourth, +2 for the fifth, +1 for the sixth 
Named meats and meat meals. Named animal fats or oils. 

+3 for the first ingredient, +2.5 for the second, +2 for the third, +1.5 for the fourth, +1 for the fifth, +0.5 for the sixth 
Unnamed meats, meat meals, fat, or oils. 
Named by-products and digests. 

0 points awarded 
Unnamed by-products and digests. 
Flavoring, plant oils, supplements, and anything else not listed. 

-3 for the first ingredient, -2.5 for the second, -2 for the third, -1.5 for the fourth, -1 for the fifth, -0.5 for the sixth 
ALL vegetables and fruits. Grains/corn/wheat will not be punished beyond other vegetables unless someone can find substantial proof that they do more harm than potatoes. I've spent a lot of time trying with no luck getting results. 

-4.5 for the first ingredient, -3.75 for the second, -3 for the third, -2.25 for the fourth, -1.5 for the fifth, -0.75 for the sixth 
Vegetable proteins (to roughly reverse the points they awarded for elevating the protein level) 

-12 for the first ingredient, -10 for the second, -8 for the third, -6 for the fourth, -4 for the fifth, -2 for the sixth 
Sweeteners (sugars that provide no nutritional benefit). 

This criteria seems to be quite effective for scoring the vast majority of foods, but do keep in mind that some foods with a very limited ingredient variety may score a bit lower than they "should". 


The Score 
All Foods are given a ranking in points, and point ranges are divided into tiers. 
Green Tier: Excellent Foods that a ferret can thrive on.** These all have a minimum of 40% protein. Most of them are grain-free and provide a promise of at least 75% animal ingredients. 
**note that Epigen cat/dog is an exception that has excellent protein levels, but does not contain enough fat for a ferret to thrive on (it is 11-12% fat) and is thus recommended as a treat or 'mixer' only. 
Blue Tier: Solidly good foods. Most of them meet a ferret's basic requirements for protein and fat and do not include any meat by-products. 
Orange Tier: A ferret could live on these foods, but I would not expect them to thrive. I would recommend switching or mixing with a higher quality food. 
Red Tier: Foods that I would NOT consider to be suitable for a ferret. 

Important Tips
  • If you're entirely new to ferret nutrition and would like a crash course to help understand our logic, visit our Ferret Nutrition for Newbies page.
  • While we believe that high quality kitten foods are ferret-suitable, there are also people who don't. If you're not comfortable feeding cat food, don't do it. You can scroll down to the bottom of the page to disclude cat foods or change the chart's scoring system.
  • DON'T feed only one food. If the formula ever changes and your ferret is picky, you will be really stuck. Pick 2 or 3 foods and mix them or rotate.
  • Whole prey or raw meat is the very best diet, I recommend checking it out before making any decisions. 

  • PointsNameTypeProteinFatFiberFirst 6 ingredients
    58.3
    Wysong Ferret Epigen 90
    dry60%20%3.5%chickenchicken mealchicken fatchicken gibletsgelatinapples
    56.59
    Innova EVO cat and kitten
    dry50.2%22.53%1.39%turkeychicken mealchickenherring mealchicken fatpeas
    56.59
    Innova EVO ferret
    dry50.2%22.53%1.39%turkeychicken mealchickenherring mealchicken fatpeas
    55.71
    Go! Natural ChickenTurkey and Duck
    dry50%21%2%chicken mealdeboned chickendeboned turkeyturkey mealchicken fatpotatoes
    54.66
    Go! Fit and Free
    dry48%18%1.5%chicken mealde-boned chickende-boned turkeyduck mealturkey mealsalmon meal
    54.22
    Wysong Epigen 90 [RECOMMENDED AS MIXER ONLY]
    dry60%12%3.5%chickenchicken mealchicken fatchicken gibletsgelatinapples
    52.62
    Orijen Cat
    dry42.0%20.0%2.5%deboned chickenchicken mealdeboned salmonturkey mealchicken liverherring meal
    51.63
    Wellness CORE cat
    dry45%18%3%deboned turkeydeboned chickenchicken mealwhitefish mealherring mealpeas
    50.96
    Wysong Epigen [RECOMMENDED AS MIXER ONLY]
    dry60%11%3.5%chickenchicken mealchicken gibletsvegetable proteinpoultry fategg
    50.1dry40%17%2.5%duck mealturkey mealduck mealchicken mealMenhaden fish mealtapioca
    48.72
    Natures Variety Instinct Chicken
    dry50%22%2.8%chicken mealchicken fattapiocasalmon mealchicken flavorpumpkin seeds
    48.6dry39%19.5%7%rabbit mealturkey mealchicken fatMenhaden fish mealpeasrabbit
    47.22
    Natural Gold Ferret Food
    dry50%22%5%chicken mealpork protein concentratepotato starchpoultry fatsoybean oilgrape seed oil
    46.12
    Innova Kitten
    dry40%22%3%turkeychickenchicken mealricebarleychicken fat
    45.6
    BLUE Wilderness Kitten
    dry40%20%3.5%deboned chickenchicken mealturkey mealpotato starchfish mealfish oil
    45.08
    BLUE Wilderness Chicken
    dry40%18%3.5%deboned chickenchicken mealturkey mealpotato starchfish mealchicken fat
    45.08
    BLUE Wilderness Duck
    dry40%18%3.5%deboned duckchicken mealturkey mealpotato starchfish mealchicken fat
    44.55
    Acana Cat Grasslands
    dry35%20%2.5%boneless lamblamb mealsalmon mealrusset potatoherring mealchicken meal
    44.06
    Innova Cat
    dry36%20%2.5%turkeychicken  chicken mealWhole grain barleywhole grain brown ricechicken fat
    44.06
    Serengeti Cat
    dry38%18%2.5%chicken mealchickenchicken fatdried potato productsalmon mealnatural flavors
    43.12
    Innova PRIME Cat
    dry42%20%3.5%chickenchicken mealpeasturkeyflaxseedpea fiber
    43.08
    BLUE Wilderness Salmon
    dry40%18%3.5%deboned salmonchicken mealturkey mealpotato starchpeaschicken fat
    42.58
    Drs Foster and Smith Ferret
    dry38%20%2.8%Chicken MealBrown RiceChicken FatDried Egg ProductLamb MealChicken Digest
    42.11
    8 in 1 ULTIMATE Crunchy
    dry45%16%3%chickenchicken mealground ricechicken fatchicken digestraisin juice
    42.09
    Path Valley Farm PVF Crunchy
    dry37%22%1.5%chicken mealrice flouregg productchicken fatcatfish mealwheat flour
    42.06
    Chicken Soup for the Kitten Lovers Soul
    dry34%22%4%chickenchicken mealcracked pearled barleychicken fatturkey mealwhite rice
    41.59
    Felidae pureELEMENTS
    dry39%20%1.5%Chicken mealturkey meallambpotatoespotato proteinpeas
    41.16
    Solid Gold Indigo Moon
    dry46%20%3%chicken mealpotatoescanola oilchickenchicken flavorsalmon oil
    41.1
    Zupreem Premium Ferret
    dry40%20%2%chicken mealchicken fatground wheatwheat flourchickenegg product
    41.04
    Before Grain Salmon Cat
    dry36.0%18.0%3.0%salmon mealchicken mealdehydrated potatoturkey mealchicken fatdehydrated sweet potato
    41.04
    Before Grain Tuna Cat
    dry36.0%18.0%3.0%deboned tunachicken mealdehydrated potatoturkey mealchicken fatdehydrated sweet potato
    41.04
    Before Grain Chicken Cat
    dry36.0%18.0%3.0%deboned chickenchicken mealdehydrated potatoturkey mealchicken fatdehydrated sweet potato
    40.06
    Premium Edge Kitten
    dry34%22%3%chickenchicken mealbrown ricechicken fatoatmealfish meal
    40.06
    Professional Kitten Chicken and Rice Formula
    dry34%22%3%chickenchicken mealground ricechicken fatpea proteinegg product
    40.05
    Totally Ferret Turkey Venison and Lamb
    dry35%20%1.75%turkey mealdried egg productbrown ricepoultry fatcatfish mealrice flour
    39.6
    Triple F Farms Ferret Food
    dry38%22%1.5%chicken mealrice flouregg productchicken fatwheat flourdried beet pulp
    39.59
    L Avian Plus Ferret
    dry36%23%3%chicken mealchicken fatwheat middlingschicken by-product mealbrewers riceground flax seed
    39.52
    HealthWise Cat N Kitten Dry Food
    dry32.51%20.48%1.67%chicken mealbrown ricechickenchicken fatherring mealflaxseed
    39.06
    Marshall
    dry38%18%4%chicken by-productschickenherring mealcornoatmealcod fish
    39
    Chicken Soup for the Cat Lovers Soul
    dry30%20%4%chickenchicken mealcracked pearled barleychicken fatturkey mealwhite rice
    38.6
    All Living Things Ferret Daily Diet
    dry40%20%3%chickenchicken mealcorn protein concentratebrewers ricepoultry fatfish meal
    38.1
    Vitalin Ferret
    dry40%20%2%chicken & chicken meat mealwhole riceherring mealwhole eggchicken liver & sugar beetvitamins & minerals
    38.08
    AvoDerm Kitten
    dry36%22%3%chicken mealground whole grain cornchicken fatherring mealcorn gluten mealwhole ground brown rice
    38.05
    Wysong Archetypal-2
    dry35%20%3%ChickenChicken GibletsPoultry fatGround Brown RiceGround WheatGround Corn
    38.04
    Fromm Kitten Gold
    dry34%20%3.5%duckchicken mealpearled barleywhite ricesalmon mealchicken fat
    37.58
    Totally Ferret Active Show Pet
    dry36%22%1.5%Chicken by-product mealRice flourdried egg productchicken fatpoultry fatwheat flour
    37.06
    Simply Nourish Kitten
    dry38%18%3%chickenchicken mealrice flourcanola oilnatural flavortomato pomace
    36.54
    By Nature Kitten Formula
    dry34%20%4%chicken mealground barleychicken fatground oatschickenchicken livers
    36.51
    Marshall Senior
    dry34%17%3%chicken by-productschickenherring mealcornoatmealcod fish
    36.33
    Royal Canin Babycat 34
    dry34%24%3.5%chicken mealricechicken fatcorn gluten mealchickencorn
    36.3dry36%19%3%turkey mealground whole wheatturkey fatfish mealturkey gravypotato protein
    36.06
    Iams Premium Protection Kitten
    dry34%22%3%chickencorn mealchicken by-product mealpoultry by-product mealanimal fatdried egg product
    36.06
    BLUE Kitten
    dry36%20%3.5%deboned chickenchicken mealwhole ground brown riceground barleyoatmealchicken fat
    36.02
    California Natural Cat and Kitten food
    dry36%16%1.5%chickenchicken mealbrown ricericechicken fatnatural flavors
    35.6
    Living World Ferret
    dry38%22%3.5%poultry mealpoultry fatground maizedried eggbrewers ricedried beet pulp
    35.52
    Felidae Chicken Meal and Rice Formula
    dry32%20%2.5%Chicken mealbrown ricechicken fategg productcracked pearled barleypeas
    35.52
    Natural Balance Ultra Premium Cat Food
    dry34%18%3%chicken mealchickenbrown ricebarleyoatmealchicken fat
    35.29
    8 in 1 ULTIMATE Soft-Moist
    dry36%18%3.6%chicken mealchickenrice floursoy flourpoultry fatcorn gluten meal
    35.04
    Wellness Kitten
    dry36%18%3%deboned chickenchicken mealriceground barleyground ricechicken fat
    35.01
    Fromm Chicken A La Veg Cat
    dry32%19%3.5%chickenchicken mealpearled barleywhite ricechicken brothsweet potatoes
    34.79
    Authority Kitten
    dry34%20%3%chickenchicken mealbrewers ricecorn protein concentratepoultry fatground corn
    34.6
    Zupreem Grain-Free Ferret
    dry42%18%3%chicken mealsweet potatoespeaschicken fatpotato proteinsalmon
    34.58
    Eukanuba Kitten
    dry36%22%2.5%chickenchicken by-product mealcorn mealcorn gritsdried beet pulpdried egg product
    34.56
    PRO PAC Cat Kitten
    dry34%22%3%chicken mealriceground cornchicken fatdried eggbeet pulp
    34.55
    Eukanuba Adult Lamb and Rice Formula
    dry34%21%2.5%chickenchicken by-product mealcorn mealcorn gritsLambBrewers Rice
    34.54
    Evolve Kitten Formula
    dry34%20%4%chickenchicken mealground brown ricecorn mealcorn gluten mealchicken fat
    34.54
    Iams Kitten
    dry33%21%3%chickencorn mealchicken by-product mealanimal fatdried beet pulpdried egg product
    34.52
    Holistic Select Cat and Kitten
    dry32%20%2.8%chicken mealground brown ricechicken fatoatmealanchovy & sardine mealflaxseed
    34.36
    Nutro Natural Choice Kitten
    dry43%18%3%chicken mealcorn gluten mealground ricechicken fatwheat flourherring meal
    34.04
    Prairie Chicken Meal and Brown Rice Medley
    dry34%20%2.5%chicken mealbrown riceoatmealchicken fatmenhaden fish mealground flaxseeds
    34.02
    Go! Refresh and Renew
    dry32%20%3%chicken mealdeboned chickenwhole brown ricewhole white riceoatmealchicken fat
    34.01
    Halo Spots Stew Grain-Free Cat
    dry33%18%6.5%chickeneggspea proteinvegetable brothchicken fatpeas
    33.54
    Marshall Select
    dry36%18%4%chickenchicken by-productschicken by-product mealcorn mealdried beet pulpcane molasses
    33.53
    Kaytee FortiDiet Ferret
    dry35%18%4%poultry mealfish mealpork fatsoy flourkibbled corndried beet pulp
    33.3
    Eagle Pack Kitten
    dry34%21%3.8%chicken mealground brown ricechicken fatcorn gluten mealground yellow cornanchovy & sardine meal
    32.85
    Taste of the Wild feline
    dry42%18%3%chicken mealpeassweet potatoeschicken fatpea proteinpotato protein
    32.75
    Holistic Blend Chicken and Salmon Feline
    dry32%18%3%chicken mealground brown ricechicken fathulless barleychickensoy protein
    32.58
    Purina ONE Healthy Kitten Formula
    dry40%18%2.5%chickenchicken by-product mealcorn gluten mealbrewers ricesoybean mealanimal fat
    32.34
    Pro Plan Dry Kitten Food
    dry41%18%3%chickenbrewers ricecorn gluten mealchicken by-productanimal fatsoybean meal
    32.04
    Blackwood Kitten
    dry33%21%2.75%chicken mealbrown riceoat groatschicken fatdried beet pulpegg product
    31.77
    Sunscription Vita Prima Ferret
    dry36%16%4.5%porcine meat and bone mealchicken by-product mealground cornbrewers ricepoultry fatcorn gluten meal
    31.55
    Sheppard and Greene Ferret Food
    dry35%20%2%chicken mealground ricecorn gluten mealchicken fatground corndried whole egg
    30.77
    Browns Zoo Vital Ferret
    dry34%18%2.5%poultry mealground wheatchicken fatfish mealwheat middlingssoybean meal
    30.29
    Path Valley Farm Premium
    dry34%20%3.5%poultry mealpoultry fatcooked cornsoy mealporcine blood mealwheat middlings
    30.03
    Totally Ferret Complete
    dry35%18%2%chicken mealwheat flourcorn mealchicken fatbrown ricepotatoes
    29.03
    Kaytee Fiesta Max Ferret
    dry34%19%3%poultry mealpoultry by-product mealbrewers riceground wheatdried egg productpoultry fat
    29.03
    Royal Canin Kitten 36
    dry36%17%3.5%chicken mealbrown ricecorn gluten mealcornchicken fatchicken
    28.83
    Science Diet Kitten
    dry37%21%2.5%chicken by-product mealground whole grain cornanimal fatcorn gluten mealbrewers ricechicken liver flavor
    28.55
    Kaytee FortiDiet Pro Health Ferret
    dry35%20%3%poultry mealpoultry by-product mealbrewers ricepoultry fatdehulled soybean mealground wheat
    28.51
    Kaytee Fiesta Ferret
    dry35%16%5%poultry mealground cornfish mealricepork fatdried beet pulp
    27.97
    Iams Original Chicken
    dry32%15%3%chickenchicken by-product mealcorn mealcorn gritsdried beet pulppoultry by-product meal
    27.84
    Mazuri Ferret
    dry38%20.5%4%poultry by-product mealground brown ricedehulled soybean mealporcine animal fat (BHA)poultry digestpoultry fat (ethoxyquin)
    26.52
    Felidae
    dry32%20%2.5%Chicken mealbrown ricecracked pearled barleypeasmilletchicken fat
    25.75
    8 in 1 Ultra
    dry35%15%3%chicken mealground yellow cornbrewers ricecorn gluten mealanimal fatcorn oil
    24.45
    Blackwood Adult Cat
    dry30%15%3.5%chicken mealground cornbrown ricewheat flourchicken fatdried beet pulp
    23.03
    Purina Kitten Chow
    dry40%12.5%4%chicken by-product mealcorn gluten mealbrewers ricesoy flouranimal fatwheat flour
    21.51
    Meow Mix Kitten
    dry36%15%4.5%chicken by-product mealbrewers ricecorn gluten mealground yellow cornsoybean mealbeef tallow
    14.63
    Wild Harvest Daily Blend
    dry30%8%4%poultry by-product mealbrewers riceground yellow corncorn gluten mealchicken fatbrewers dried yeast
    animalfishvegetableother
    *All foods below 8% or above 12% moisture have been converted to kibble matter on this chart