I've never switched from EVO, other than to go from the original formula to the red meat formula. Finding something that Bimmer eats without having to be coaxed or coerced isn't that easy, and he dives into his RM. He will turn up his nose at raw poultry or pork for it, and seems to even prefer it to some commercial beef.
He's ten years old, looks and acts half his age at most, no skin issues - which is a big deal for me in my experience with GSDs, his teeth are beautiful, he's only had to go to the vet to have an encysted oil gland checked and evacuated and to have his head stitched up after he went after a bear.
Kharma's thriving and loves it.
Tallulah has done beautifully on it, especially considering that she is coming back from a severe case of parvo before I got her.
They all love it.
If it ain't broke, I ain't gonna try to fix it