Yes, actually, many hyperthyroid cats are more active and more vocal than usual.
Again, with the increased thyroid hormone their energy level increases. Some can act hyper like kittens.
Well, we can see that for a number of reasons - stress is one of them. However the thyroid plays a large role in the skin also, and we can see changes from this too. I would start with the blood work. If we confirm hyperthyroidism, I would start by treating this disease before assuming the hair pulling is from something else.
Other than GI disturbance like vomiting or diarrhea, she has most of the other usual signs.
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