Yep, all dogs are different
But it would be kinda neat to see what everyone feeds. The reason I feed a 5 star food to my maltese is only because there are NO by-products whatsoever. The ingredients are all natural and Human Grade, and that's important to me. Different things work for different doggies though
I don't see any reason to switch dog foods if your dogs do well on certain foods unless you want to
Miko does Not get an all natural dog food like my maltese because he has to eat Hill's prescription dog food for his liver and bladder stones. And that's what works for him and keeps him healthy