Bulldogs World

After 2 years of struggling we decided to have our 3 year old's tail amputated in late April.  He did very well with recovery, was  ready to come off of pain killers almost immediately, no whining, or pain post surgery.  Healed beautifully, and finally finally stopped scooting and itching.  However, he began to bark all the time (never ever did this before), and had about 10x the energy.  He also began humping my husbands leg, and jumping up on him all the time.  He had done very well with the addition of our first baby last June.  However, with all this activity, and knowing that the baby would soon be more active with the dog, we decided to get him neutered in late May.  Again, he did wonderfully with the surgery.  However, the behavior hasn't changed.  He is barking, is never ever tired and relaxed even after a good hour outside (this used to be enough for him for 1-2 days. 

I have heard about people feeling "off" for extended periods post major surgery.  Anxious, tired or not themselves.  I'm wondering if anyone has heard of a similar phenomena in dogs?  Vet hadn't heard of this, but thought that, perhaps it could be.   We are at our wits end.  Any suggestions?  I haven't posted in ages, but used to and always found everyones suggestions so helpful!