We have a zooplus shop here but I never went- just because another shop is closer to the supermarket I usually go.
It is true that lots of dry food, even vet ones have carbs as their main ingredient- which doesn't sound good to me. Eg the Royal canin for the exigeant cat (which they all love, as they are exigeant all over) contains plants as the first ingredient.
That Almo nature stuff that you mention is wonderful meat, chicken or tuna. It looks as if you could eat it by yourself- not yucky at all. It is very expensive, I think it is made in Italy but I buy it from time to time.
The normal shop variety wet food contains only 4% of the meat after which it is named, i.e. chicken, rabbit etc. There seems to be a tendency now to name it in a way that appeals to humans- like "beef fillet stripes in tomato sauce". On the back cover it usually says that there is only 4% of beef, the rest is mixed stuff.
There are now some foods that guarantee you more of the food that's on cover e.g. in Germany there is Miamor on which they guarantee you 60% chicken if there's chicken written on them. They are not as expensive as Almo .
When Filou was sick he used to love Almo chicken which contains chicken in (of course unsalted) broth with 1% of rice- that was just his cup of tea