Unfortunately truly low carb or DM-specific food is not an option right now due to her needing to be on a specific diet for IBD and cutting dry food out of her diet entirely is not an option due to her being very underweight.
Wet food
Brands: Royal Canin Select Protein Duck (PD), Hill’s Prescription Diet Z/D
Royal Canin PD carbohydrate content: Approximately 4.7% on an as fed basis and about 20.89% on a dry matter basis (Dec 2018)
Hill's Z/D carbohydrate content: approximately 40.7% on a dry matter basis (Aug 2021)
Amount/Frequency: As desired throughout the day)
Note: Offer both brands above to ease addition of Royal Canin PD
Dry food
Brands: Purina ProPlan Veterinary Rx Hydrolyzed Diet, Purina ONE Indoor Advantage
Amount/Frequency: Free graze (mixed bowl of the brands above)
Typically tends to gravitate towards dry food frequently, but have noticed since introducing the RC Duck she not eaten as much dry food