Hello, Rockie is teething and has not been eating as much in the last two days

He is normally a gobbler, but he did not eat yesterday morning. When I get up every morning and feed him @ 5:30 or 6:00 he is right there waiting to eat. He did eat last night though. But again this morning nothing, I called my daughter and she said he ate a little. His teeth are coming in the front at the bottom. So I am attributing this to soreness. I called our vet and they said if he should be okay as long as he is eating something and if I do not
feel comfortable to bring him in.