Thank you so much for your suggestions, the first test was at a 5.7 and I am awaiting the results of a second test. The initial blood test also revealed Diabetes Insipidus but I feel there is more to it than that and I see many of the symptoms of hyperthyroidism which i've read is usually results from medication for hypo and I had not given any such meds so it's a mystery how it was contracted. And we did lose her half brother in January which would explain added stress.
Thanks for your reply. For the back/neck pain we put him on a mild pain killer and an anti inflammatory meds and had him on low exercise and I had already replaced the collar with a harness several months ago since both my boy and girl had incidents with with a pulled muscle or pinched nerve in the neck/back which comes and goes. And yes a low thyroid can cause seizures but my vet told me that the second blood test indicated that the low thyroid is due to a secondary cause rather than a hypo-active thyroid gland.
My boy is at the vet right now and I will be picking him up at he end of the day.