My husband and I have had 3 rescue bassets. Bowser is number 3. As was predicted by his foster mom, he is the cuddliest we have ever had. We’ve had him for 2 1/2 years with no problems worth mentioning. However, yesterday, as I entered the living room with my morning coffee (he was on the sofa, with his head in my husband’s lap) he not only growled at me, but showed his teeth as he barked aggressively. This behavior continued all day any time I got near him. I could use any advice on dealing with this behavior.