I think we have to tell the Whiskas people that they have to produce really yummy treats that can be opened to put a pill in and closed hermetically

With Filou we managed most pills by cutting a slot in a piece of wet cat food or in raw meat and get the pill in there.

I wish you find the trick that works for Sterling! It's devastating if you try and they don't talk to you anymore or they just don't get the meds they need!