Aaaaaaaah yes, he seems to be acting like a puppy. Most people think bullies are lazy, but they usually don't get lazy until sometime after the first year. The only suggestion I have is to make sure he is not getting too much protein,(26% is more than enough for a bully). this can make him very energetic and grow too quickly.
Now, funny you say your son looks like a scratching post! This will probably be tough to try to get your boy not to get your bully so excited so that he will stop scratching him. I assume this is because he is getting jumped on?