Puppy with hind leg issues

Question
Hello,
We have a 5 month old boxer puppy (as well as a 1 year old boxer puppy)who seems to walk as though his entire backside is detached.  He often falls over, back legs only and he can not jump and has a hard time with stairs.  He is 29 lbs at this point and should be able to get on the couch or bed.  When he walks he has such a sway and he lays down funny, like he just falls to the side.  We had x-rays done because it looks like hip dysplasia.  X-rays show no problem.  Where do I go from here.  Suggestions are to wait and see what happens, chiropractor, and neurologist.  I know it is not unusual to have clumsy awkward boxer puppies, but his issues are very pronounced.  People ask me what is wrong with him all the time.  Thank you for your time.

Answer
Cindy, this breaks my heart.

A 5 month old puppy with such severe problems bothers me.

If a vet's x-ray show no displacement or physical problem, then it is neurological.

You MUST get him to a canine neurologist specialist to see if it can be corrected.

Please keep me posted on this. I would love to see him helped.