I felt this subject needed a new thread based on information I received today. For those of you who are concerned about your golden having head tremors as I am please read this. My girl KD has had head tremors on and off for 3 years. I took her to one vet and he had never heard of the problem offering no more than expensive MRI, etc. we only notice it q few times a year then it stopped. My research indicated it was idiopathic. I took her to another vet today and had some blood work done. KD Is about 12 pounds over weight and sleeps a lot but what dog doesn't sleep a lot so we didn't think of this as a problem, however she could sleep in my bed all day. Bottom line is the vet told us she has hypothyroidism and she has to be on medication the rest of her life. Thankfully it is not expensive. As soon as I got home I googled the condition and found it is very common in a few breeds of dogs, goldens being the first on the list. Symptoms include but are not limited to weight gain, lithargey and uncontrollable shaking. So I am cautiously optimistic the medication will be the answer to the tremors and help her feel better. I hope this helps anyone else with this problem.