Guido - 3 year old male Labrador Retriever

Hello, my name is Guido, I am a 3 year old, male Labrador. I came into the Mayhew because my owners felt they could not cope with my possessive nature over food and toys. I am now in a foster home and my foster dad is teaching me manners over food and toys. He is very kind but very firm with me and says I respond very well when I have clear guidelines. Already I know he is the leader and I let him take anything out of my mouth, whether it is food or toys. When I want to play I now get the tennis