6/7/2012
Bird Veterinarian: 
Dr. Pat
Greetings, I am Dr. Pat. I have worked with birds for many years. I will do my best to help you.
"strokes"  are fairly common in Amazons. The good news is that with treatment and  rehab, they may be able to regain most of their functionality. It can  take time, and patience, but is entirely possible.
He may be able  to be treated. Right now, taking him to a GOOD and experienced vet that  is very familiar with parrots will increase his chances of survival and  recovery. An inexperienced vet may suggest euthanasia--which may not be  the right path. I have had comatose birds take up to a year, but they  came back to 95% themselves. So it is definitely worth the effort.
If  he were my patient, I would put him in oxygen right away, and treat  with valium (helps the anxiety, and even the brain damage a little),  calcium (many nervous issues can be partially due to calcium deficit),  tube feed if he is not eating enough, and fluid injections if he is not  eating at all.
Be prepared for a possible repeat episode.
It  will be very important in his recovery that he be on a good diet and  husbandry plan (see below) and your vet may opt to put him on lactulose  to help any underlying liver issues. At some point he should have lab  work done (right now it would reflect his trauma) and treatments  designed based on facts.
Physical therapy on the weak limbs will be important, if the vet does not find any fractures or other trauma.
Move  the bird to an aquarium, box or carrier with soft towels in the   bottom, no perch, and food and water in low bowls that can be reached   easily. Put the whole thing on a heating pad on low or medium. Check it   frequently, no overheating allowed! Keep the unit partially covered,   warm and quiet. White paper towels or white cloth towels will show the   true color of the droppings.
  
Do not try to force food or  water. You can offer warm cooked  rice, pancakes, cornbread, grapes,  melon, greens in addition to normal  food.
You need to to take your bird to see an 
avian-experienced veterinarian ASAP for complete examination, diagnosis and appropriate treatment. Check  
http://www.aav.org/association/index.php?content=activeMembersList 
  for members of AAV in your area or call your regular vet and see who   they recommend; ask if they really have worked with birds a lot.
The  following guidelines help with basic issues such as nutrition,   obesity, good immune status. Surprising how the following can make a   bird healthy, and how infrequently birds are ill if they are on the   following regimen. No amount of medicine is going to work if the birds'   basic needs are not met.
  
Birds should be on a high-quality, preferably prescription, pelleted diet: I prefer High-potency Harrison's
http://www.harrisonsbirdfoods.Harrison's Bird Foods is a family of certified organic pet bird diets that were formulated to make your bird as healthy as it can possibly be.
  
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In   addition, they should be offered dark leafy greens, cooked sweet   potatoes, yams, squash, pumpkin; entire (tops and bottoms) fresh carrots   and so forth. No seeds (and that means a mix, or millet, or sprays,   etc. etc.) and only healthy, low-fat high fiber people food. A dietary   change should be closely monitored and supervised by your avian vet.
  
Daily Maintenance 
Birds  should get 12-14 hours dark, quiet, uninterrupted sleep at night.  Any  less and they can suffer from sleep deprivation and associated   illnesses. They should be covered or their cage placed in a dark room   that is not used after they go to bed. 
The  cage material should  be cleaned everyday, and twice a day if the bird  is really messy.  Paper towels, newspaper, bath towels are ok. Never use  corn cob,  sawdust, wood chips, or walnut shell. 
Food and water dishes should be cleaned and changed daily. Keep one set cleaned while the other is in use.
Fresh,   perishable food should be placed in separate food bowls. Remove fresh   food from the cage after a couple of hours to avoid spoilage.
  
Change cage papers daily, and clean the grate and tray weekly.
Clean food debris or droppings from toys and perches as needed (which can be as often as once a day).
Grit is not necessary for birds,   and will cause digestive problems and death. The best sources of   minerals (and vitamins) are leafy greens. Never give grit, gravel   sandpaper or cement perches. A bird will eat those to excess when it is   not feeling well or if there is a nutritional deficiency. They do not   need it at all (an old myth from the poultry days, even poultry do not   need it). It can cause an impaction and lead to serious or fatal   consequences.