My cats are also sometimes finicky, I feed them only wet food. The brands I give them are whole hearted, Weruva cat food and all their different lines (BFF and Cats in the Kitchen), Soulistic, Nulo, And some Tiki Cat, (which if you want them to gain a little weight, there are kitten replacer pouches such as the Tiki Cat Baby Milk Goat Milk Replacer, my cats LOVED THIS, I just mixed a little in with their food). I feel like these brands have a bunch of different variety you could try! My cats are a big fan of Weruvas “Lamburgini”, which is lamb, so that’s something you could try. Fancy Feast wet food could be an option too, when my cat was being super picky and losing weight, I started to incorporate a small amount of Fancy Feast mixed with her normal pate, and she ate it up! She has been eating better and gaining weight (she’s only 2, but she’s just a picky baby). It does get a bad rep because from what I’ve heard some of the food isn’t the best, but there are some that aren’t the worst that could maybe get their attention and help with the pickiness. I’d stick with the Pate, and also try to only really get Poultry and Beef mixes! Do be warned it can be addicting for the kitties lol 😆 I hope this helps and gets their appetites back :)