mine have chicken or turkey most often but also really liked duck, bacon/gammon/ham (which is salty so not often) steak and for fish in particular river cobbler went down really well (nice and cheap!) fresh sardines,fresh mackrall, fresh tuna, prawns and they have had scallops which vanished at a ridiculous speed but theyre also not likely to get again! i generally pick up whatever i can reduced/cheap at the supermarket and they get that for a treat. for regular treats its usually natures menu dried treats