A search of www.cdc.gov leads to the World Health Organization

WHO sites > Food safety > Microbiological risks in food
http://www.who.int/foodsafety/micro/avian/en/

WHO is aware of concerns that the virus could also spread to humans
through contact with contaminated poultry products. To date, no
epidemiological data suggest that the disease can be transmitted to
humans through properly cooked food (even if contaminated with the
virus prior to cooking). However, in a few instances, cases have been
linked to consumption of dishes made of raw contaminated poultry blood.

I doubt anyone has done any specific studies as of yet on poultry in
cat food. Most of the Avian flue cases are transmitted through the bird
feces or contaminated surfaces.

You could "Google" a search for your topic and perhaps some of the
Veterinary Schools have begun research.

Cooking the meat kills the virus.  A much bigger threat is cats eating
wild birds.

-L.