Our yorkies are about the same age. Atticus was born Dec 27 and weighs 4 pounds now. He has never been much of an eater. Recently, I thought I'd try to switch to some other food (I was giving him what the breeder used). I posted a thread to find out what others here feed their yorkies. It was most helpful. Result: Atticus loves Chicken Soup for the Puppy Lover's Soul canned food. He's eating more than he's ever eaten before. good luck