That is a little odd, you didn't mention how old he is. Is he a "teenager"? First thing to do would be to get a vet check up and make an appointment to get him neutered. Besides being healthier for your boy it will take away the hormones that could be making any behavioral issues worse. Typically these types of behaviors get worse during the "teen years" (just like in human teens) as they are finding their place in your home and in the "pack".
The second thing would be to institute the "Nothing In Life Is Free" (NILIF) concept. If you google it you will find lots of ideas but basically the concept is that the dog has to mind you to get anything he wants (eating, attention, walks etc). This puts you in the position of "pack leader" and stops the "disrespect" of growling or biting.
Good luck with your boy
Teresa |