Chicken wings from Lidl or Aldi, £1.49/kg. They can eat the whole thing, skin, bones. Big cat is 19 this year and is doing well, can still crunch up the bones. They Freeze and thaw well. I also get shot pigeons and rabbits. They like beef bone marrow (free from butchers). Anytime I can get offal cheap they get it, big cat won’t touch liver. Little cat catches big rats and all manor of small mammals to supplement. I feed everything raw and outside, unless it’s pouring down with rain/snow. All three bury/cash food and go back to it when they want.