[Julie1760]

You need to make a decision on what you are going to do with the puppy.

If you are going to rehome..then rehome.
If you are going to keep him, then keep him with all his faults and love him and work with him to make him a valuable member of the family. If you keep looking at him as a pain in the butt, then that is how you are going to feel about him in general. That isn't fair to him.

If you find out he does have a liver shunt, are you going to get rid of him because he has a problem?

If having him makes your life stressful...then you are also making his life stressful, even if you don't mean to.

I hope you find a solution for both of you.