My sisters 8 month old puppy won't eat. He drinks loads of water, seems otherwise fine I.e. not lethargic, vet check up reveals nothing but he's very skinny. She's had him for about 4 weeks before that he was in a kennel for a month he hasn't been a big eater since she got him but it's getting worse. She's tried lots of different kibbles, with and without water added. He eats a few pieces then turns away. She got him to eat some leftover steak but obviously this isn't a habit it together into. Tried hand feeding but still only eats a handful then seems disinterested. My dog would eat her bowl ifit wasn't metal, even after surgery so I don't know what advice to give her. Anyone got any ideas?