Working with a holistic veterinarian or trying some holistic approaches at home can reverse the behavioral change that I feel was caused by the surgery or the anesthesia. Some animals are sensitive and do have serious reactions that I could not treat when I merely had my conventional treatment. 

I strongly recommend finding an integrative
veterinarian with whom to work. This is a person trained in many different
approaches, including using conventional drugs only when absolutely needed.
Working with one can increase the chance that your cherished companion can live
a long and healthy life after recovering from this current problem. There are
good ones and great ones, and a few homeopathic veterinarians will consult by
phone or email. You can go to the web sites for each type of holistic practice
and use their referral list to find one near to you. Many practitioners are
members of only one or two of the organizations, so you do need to go to every
site to find who is near you:
1. Wide range of treatments: http://www.AHVMA.org, American Holistic Veterinary
Medical Association and http://www.civtedu.org.   
2. Homeopathic veterinarians (these can often help you by phone if no other
holistic practitioners are nearby that you like): http://www.theAVH.org and
http://www.DrPitcairn.com;
3. Chiropractic and Osteopathic – http://www.animalchiropractic.org; http://equineosteopathy.org/ (they treat
dogs, too)
4. TCVM (Acupuncture and Chinese medicine): http://www.IVAS.org, http://www.aava.org &
http://www.TCVM.com
5. Herbal – http://www.VBMA.org

At home you could take a class to be attuned in Reiki and offer it to everyone in the house on a daily basis. This may reverse the problem (see below). flower essences are totally safe and could help him become normal again. Maybe try a session with Sharon who makes the Anaflora line and is also an animal intuitive. 

Personally, I think every person who lives with or works
with animals must know at least Level I Reiki. The practitioner offers this
energy and the animal comes over to get it (or places her hands upon the
animal), or it can be done from a distance, even around the world with the
intent for healing to occur. The energy flows through the healer into the
animal. This is based on directly applying Chi (energy) to rebalance the energy
field so it no longer needs to produce the physical symptoms. It is a very good
adjunct to any healing modality, especially to relieve pain and inflammation. I
have seen cats who began to eat again when their food was treated with Reiki.
It also “takes the bad out of” things. By doing Reiki on smelly water
in restaurants I have been able to drink sweet tasting and smelling water. Use
Reiki anytime that you must give injections, vaccines, drugs, flea or heartworm
drugs, or other substances with potential toxicity. Reiki is great to calm
animals, relieve discomfort, and can deeply heal some problems in some animals.
 

1. Great information on Reiki – http://www.reikicourse.org. 
2. Kathleen Prasad is a wonderful teacher and works with my favorite sanctuary
and holistic education center, BrightHaven http://www.brighthaven.org. Kathleen leads
a free monthly telechat for anyone trained in Reiki and using it with animals.http://www.animalreikisource.com/. 

3. If you cannot find a Reiki Class near you (same class for people and animals
as it connects you through an “attunement” to the healing energy of
the universe, making you a channel of healing), the following groups offer long
distance, free, attunements. 

a. http://theholisticcare.com/forums/viewtopic.php?f=6&t=13, 
b. http://freereikiattunement.com/
c. Christine at cbearse@earthlink.net, http://www.awakeningrainbows.com. To receive
free distance Reiki send her your first name only, city and state, and whether
or not you have had any Reiki training.  She invites you to include your
pets as well.  She uses a teddy bear and does a full body Reiki distance
treatment for one hour each Sunday evening from 9 p.m. until 10 p.m. EST. 
d. And a team of over 100 healers will send free healing energy until you say
not to. Email Barbara at nancelot01@aol.com with your healing request, name of
animal, species, color & age. In the subject say request through Dr.
Chambreau

4. for a fee:

Excellent recommendation in 2015 – http://reikishamanic.com/

http://www.ReikiBlessings.com offers many types of
energy healing classes- search a bit to find the reiki ones or email them. Long
distance healing and training is at http://www.animalhealers.homestead.com. 
5. Get a free treatment for yourself at http://www.interdimensionalhealing.com.

I am so glad, Crystal.
If you want to learn more yourself, join our Thur 1-2 eastern Blabs run by Jeff Feinman (free) and then look at taking his on line course coming up or one of my two in Maine and Maryland in Sept/Oct. Sign up for my RSS feed on my site to learn more.