I think that is fat, not muscle.
I’d look at his feet. Problems can show up elsewhere.
Know what? I think he is fat. Lunged a bit today and he is pretty jiggly. We’ll take that down a notch and see how his wither growth looks.
I am not seeing the dip you were talking about, but agree he looks heavy
i see the dip.
Just like humans, horses can have the very same feed and some just get fat…I have a fat herd and a normal herd. The fat herd follows the sheep (or cattle) when i rotate pastures during growing season. I have this one chub of a foxtrotter that i can’t help myself from sing-songing to: “Must be jelly cause jam don’t shake like that.”