Perhaps he gets what he needs from what he eats. If he is full of energy doesn't sound like his is starving himself. And some dogs just are not that interested in food yet stay healthy. I know a border terrier whose owner says he lives on air, yet the dog is fit and healthy and happy.
I wouldn't leave his food bowl down for more than 10 minutes. If he doesn't eat it in that time, well in my house, he'd have to wait till the next meal time.
I had a fussy puppy once, very much as you describe your dog, but that was instanly cured when I put him on raw. So may be reconsider if that could be tried?
PS Caution - I tried to get him to eat by allowing other dogs around but I think I created a food resource guarder. Took long while to train out then. Whilst he may not be guarding food that doesn't particularly interest him, if you find food he really likes, he feelings might change.
I wouldn't leave his food bowl down for more than 10 minutes. If he doesn't eat it in that time, well in my house, he'd have to wait till the next meal time.
I had a fussy puppy once, very much as you describe your dog, but that was instanly cured when I put him on raw. So may be reconsider if that could be tried?
PS Caution - I tried to get him to eat by allowing other dogs around but I think I created a food resource guarder. Took long while to train out then. Whilst he may not be guarding food that doesn't particularly interest him, if you find food he really likes, he feelings might change.