I't varies sometimes I notice it a couple times a week and other times it may be a month or longer. Offcourse he may be having them and I'm not around to see them.
It's been going on for 5 years.
At the beginning he can walk, because if I'm in the room he comes to me. Eventually hes not able to walk and will stubble and fall. Seems like a severe muscle spasm.
No blood tests were done.
I've wondered if it could be associated with a near death he had at the vet when he recieved the Heartworm vacination. He collapsed and went in to shock. Fortunately I was still at the vet and they gave him ephineferin IV for his reaction. About a week later all the hair fell out at the injection site, about the size of a grape fruit.