I am fostering an 8yr old cocker spainel. He was neglected covered in mats. He is now shaved, he also had an eye removed, a tumor near his butt and was neutered. He still has stitches where is eye was an he wears the cone of shame until tuesday. He is a happy sweet hyper boy. Loves to give kisses and the only comand he knows is sit and his name (hank) . My problem is this, i have picked him up around the chest area just so his front paws come off the ground. He has growled at me for doing that, he backed away from me and continued to growl...then the next time he doesnt growl. Next, he suddenly chases the cat and growls at her. He doesnt listen when i tell him no. Today i took him by the collar and gave a tug, which ive done before and he was fine. today he growled and gave me a stare down when i did this. Even after i let go he continued to growl and stare. But never beared his teeth........ I yelled. He kept on doing it. Then i left the room and he followed a few minutes later it was all tail wags and kisses. How do i handle this? Why is it doing it? He has only been with me 4 days. I have 2 cats and 2 other dogs.