This is some "old" food info but maybe it may help you get started. It was put together by another old acro mom from England.
The numbers after each food refer to % of calories from protein/ fat/ carbohydrates/ and finally Calories (kcal/100g)
Whiskas Fisherman's Choice in Jelly Pouches 38.0 54.3 7.6 78
Rabbit in Gravy 37.0 50.5 12.5 76
Steam Cooked POUCHES, Poultry Selection in Jelly (Poultry, Turkey, Duck, Chicken) 38.0 54.3 7.6 78
‘Oh So Meaty’ chicken pouches (sold singly) 48 47.7 4.4 80
Rabbit & Chicken in Jelly 37.5 56.9 5.6 75
Butchers Classic Fish & Meat Selection in Jelly 37.5 53.6 8.8 80
Felix in Jelly (Chicken, tuna, rabbit, turkey, beef) 38.2 53.5 8.3 72
in Jelly, meat selection Foil Trays (Rabbit & Lamb, Duck & Beef, Chicken & Turkey). 40.6 52.2 7.2 73
‘As Good As It Looks’ POUCHES, Meat Menus of Succulent Steaklets in Jelly (Chicken, Beef, Rabbit, Lamb) 67.1 29.1 3.8 73
Tesco Premium Cuts In Jelly Pouches (chicken, tuna, Salmon & Prawn, Rabbit & Turkey) 36.5 55.3 8.2 77
Finest Succulent Chicken Breast Collection pouches 71.7 27.2 1.1 63
Sainsbury Pouches in Jelly 33.5 56.0 10.5 84
Kitekat Chicken & Rabbit in Jelly 31.3 54.3 14.3 78
Royal Canin Recovery 39.0 51.3 9.7 108
Hill’s m/d Dry 43.0 44.0 13.0 -
Hill’s m/d Canned 46.0 41.0 14.0 -
I hope this makes some sense to you and helps a little...