Terrific!!
Fish sounds like an excellent food, especially the oilier safe fish like salmon. There's tons of lore on the net about how good fish oil is for joints, skin and hair.
Chicken liver might be good too, as its rich in vitamins oil, iron and is still easily digested.
My snakes like liver almost as much as fresh backyard worms, buts its a rare treat since oil based vitamins can build up to toxic levels if overdone.