Homemade dog food for a cancer dog?

Hey im looking for some recipes for my 12 year old dog who has a cancer... I have been trying to look up recipes but they seem to all have grains (which cancer feeds off of). I need some recipes for low carb, grain free, protein and veggies. We have made some chicken "stew". He is now very bored with this... i need some new fresh ideas! thanks (portions would be great, im new to this, and he is about 95lbs great pyrenees golden mix)