Quote Originally Posted by makbike View Post
You mentioned that they have regular vet checkup, does this include a good blood panel? If not, I would suggest you take both cats in and request a senior panel. This, I would think, would include a check of their thyroid levels. Hyperthyroidism is common in older cats and can manifest itself in aggressive behavior. Just a thought/suggestion.
Yes, it does. So far, all thyroid levels have been normal. Thanks for the idea- it's definitely something to research and consider. If this nonsense keeps up, we'll be back at the vet's and I'll ask for updated bloodwork.