There are two bulldogs in "Tom and Jerry:" Spike and his son Tyke. Spike is known as a tough bulldog, who sometimes helps his friend Jerry when he is in trouble with Tom. Tyke is known as a sweeter dog who does not try to cause any trouble.
Spike generally likes to relax in his kennel with his bone. He is also known as being a very protective dog, watching over his son and making sure he gets his peace and quiet. Tom and Jerry both know not to bother the bulldogs, especially if Tyke is sleeping. If Tyke ends up being bothered, it usually means trouble for Tom.