Hello and thanks for investigating this important question!
An embolism is somewhat low on the list of things that can cause this symptom: embolisms are usually accompanied by a great deal of pain.
In older dogs (especially larger breeds) there are a number of injuries or degenerations of the "Caudal Cervical Vertebrae" (spinal bones in the lower neck) that cause damage to the spinal cord nerves. These syndromes are often called "Wobblers". The effects are felt from the location of the damage-downward toward the tail (pain, weakness in the legs, etc.).
The causes of these nerve injuries include, but are not limited to:
1) Congenital (genetic illness expressed since birth);
2) Arthritis of the spine or other degenerative changes;
3) Bacterial or Viral Infections;
4)Tumors.
Similar problems can occur in the lower spine (lumbo-sacral vetebral degeneration, degenerative myelopathy, etc).
It is also possible that there has been direct damage to the sciatic nerve in this leg.
If this nerve condition is not confined to the leg, but has originated somewhere in the spinal cord, there can be further problems with nerves that control your dog's other leg, bladder, bowel, and so on.
You might ask your vet at this stage if it would be best to go directly to a Veterinary Neurologist for a complete and specific work-up. This can be expensive, and so many regular docs don't like to feel they are pushing folks into a commitment they can't make.
I would consider this more urgently since you are having so much trouble with his appetite! Baytril can cause some digestive irritation, but Bouviers usually EAT.
Here are some links that give additional details about spinal cord issues:
http://www.petplace.com/search.aspx?q=knuckling&c=1&x=11&y=6
http://www.petplace.com/dogs/cervical-vertebral-instability-wobbler-syndrome/page1.aspx
If you need help finding a specialist, here is a link that can help you do this:
http://www.caninegeneticdiseases.net/ataxia/Neurologist.htm
I would be glad to give you any additional support...just Click "Reply".
Edited by GenB on July 13 2006 at 1:25pm
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