I have a 7 week old puppy that I have bottle fed because his momma died after giving birth. He is vicious when you pick him up. He growls,squeals,bites and show his teeth. He very skiddish and other times he is okay with you petting him. From the beginning none of my other Yorkies wanted anything to do with him and still don't. His eyes don't look like a normal Yorkies do it's hard to explain. Very sad about this one when I was his momma all this time. He knows his name and comes but sometimes when I call him he runs away. He is very playful most of the time.