About three weeks ago, our Pomeranian Prince began having seizures. We took him to the vet who told us that he might be experiencing brain damage, and that his heart murmur had worsened. She told us not to allow him to do a lot of running, jumping, and to keep him out of the sun and heat.

Yesterday, he had another seizure and his hind legs appeared to give away on him. He had another seizure - but after laying down for a while he was up and walking around again.

This...