I do have a question about aggressive puppy behavior. I have read a lot of things that say when a puppy is tired it will "throw tantrums like a toddler". We are rehoming out Boxer puppy today but I want to make sure I give all info to the new family. The pup doesn't growl about food or toys (unless playing with my big dog and it seems playful) but when she is tired and does something we have to correct she growls and barks and at times will be snappy with us. She has nipped a few times but never broke the skin. She doesn't seem to act this way unless it's nap time. We usually ignore her when she acts this way. Today when it happened we all just stood there and didn't react, she whined and looked at us. She is young, almost 9 weeks old. I didn't know if this was normal behavior or something that is really bad.