I have a Buck who'll turn 4 in April
Yesterday I filled up his food bowl and give everyone pea flakes and dried carrots pieces (Which they all love)
But I went and checked on him and he hadn't are any of it
I'm pretty sure he's drinking
But he hasn't touched his hay barely either
are you gently massaging his belly? if you do so do you feel any lumps in there? Sometimes if you wet some greens and keep bugging him with them he'll grab them just to spite you and sometimes that gets them eating.