2 6 month old boys. They LOVE Encore/Applaws wet. They hate HiLife.

One is kitten size will eat a varied diet of Kitten pouches, dry and water.

The other is a big boy and pretty much is only interested in Encore and will only eat a small amount of other stuff if Encore is mixed in (incl Natures Menu, Hills, raw).

Encore/Applaws states it's complementary so I want to ensure they are getting all the stuff they need to be healthy. I am happy to continue the non fussy one on kitten pouches with some Encore, but the fussy one, am I doing him harm just giving him Encore with say a much smaller amount of kitten pouches/raw?

Or can they have Applaws/Encore with Applaws/Orijen dry?