Quote Originally Posted by Karen
Don't even let him lick the plates, as he may have food allergies that are causing the loose bowels, etc.

Buy a good lamb-and rice (usully safe for dogs with allergies) food, and make sure no one is giving him treats during the day, either. You've got to break this bad habit. He will start to eat, when his own food is ALL there is available to him. Eventually, when he's back eating normally, you could reintroduce treats and tidbits now and then, but be very careful what's in them, and watch for abnormal poop - that's a sign!
I didn't think of that but Karen's right. It may very well be a food allergy. My friend's dog can't eat anything but duck! Not even lamb and rice. Unfortunately, it took many allergy tests to find out and alot of money, but she's got a reason now and she's correcting it. I would try lamb and rice also to start. Let us know how you make out. ]