When Dino was 3 and DH had long since been back at work, we thought that maybe he was getting lonely. So, we thought he should have a pet. Enter Miss Daisy. Daisy's story will be told next, so I won't go into a ton of detail here other than to say that Dino clearly did not want a pet. He had the cat to keep him company, and he had no interest in a dog horning in on his territory. Granted, his relationship with Cassidy was somewhat strained. She filleted his ear and sliced his eye, but they eventually got past this. But the introduction of Daisy was when Dino decided it was time to become a Grumpy Old Dog.
He is also polite when he is given a treat. He's not one of those dogs that will snap your fingers off (I'm looking at you, Miss Daisy!); instead he takes whatever is offered in a very polite manner.