Welcome Jules! Yes, bullies are kinda like toddlers. They will test you and test you. They know they are not allowed to, but they will do it just to see if they can get away with it. lol
The benefit to this is that they are like real children..... we have had many animals and there is just a connection more 'human' like I guess to me, they are like having a 2 year old. Part of what makes them so special.
Have you owned and trained other breeds before? Unlike most breeds who will understand commands and adhere to them, it takes extra and constant and especially consistent training. If yours came from a home that did not do these things, he will have much catching up to do. Think of this as bonding time
If you have any questions just ask. @Libra926 has a great stew for weight loss, as a matter of fact, I need it too!!! Very nice to meet you!!