Very detailed article about blood clots. I wish i knew what proteins or what they found speficially wrong with dad's blood. I would love it if you call the blood specialist to get the results of any blood work they had done.
http://www.stoptheclot.org/natt_publications/Thrombophilia_A_Guide.pdf
NOW... the foods to avoid eating... Looks at anything that says 1000% DV (DV means Daily Value) Its how much is recommend for a person in a day. Anything that is 10 time more is too much for dad
http://www.healthaliciousness.com/articles/food-sources-of-vitamin-k.php
This web page shows in chart form what you should and should not eat..
http://www.healthaliciousness.com/articles/low-vitamin-k-foods-for-a-coumadin-warfarin-diet.php
Pretend you are on blood thinners, so you don't want to eat anything that would make the blood thinner work less...