Hi
My dog also experienced this since she was little. The first time was her back leg then to her other leg eventually all over her body. She looked and sounded as if she was in pain when it really got bad, I thought I would have to put her down. I took her to a neurologist and they had only seen what she had in a video study about Jack Russels. They prescribed me with Mexiletine which in the study showed that it had help with the condition. This is a heart medications for murmurs in people and I know that is not what your dog has but it works. I have been giving her this medication for almost a year and all spasms have gone away. The only time they reappear is when I miss a few doses. They called the condition Myo...something (I don't have my papers with me).
I hope this helps.
Patricia
My dog also experienced this since she was little. The first time was her back leg then to her other leg eventually all over her body. She looked and sounded as if she was in pain when it really got bad, I thought I would have to put her down. I took her to a neurologist and they had only seen what she had in a video study about Jack Russels. They prescribed me with Mexiletine which in the study showed that it had help with the condition. This is a heart medications for murmurs in people and I know that is not what your dog has but it works. I have been giving her this medication for almost a year and all spasms have gone away. The only time they reappear is when I miss a few doses. They called the condition Myo...something (I don't have my papers with me).
I hope this helps.
Patricia