Morgs hibernate in winter?

Anyone feel that Morgs tend to hibernate, or be less active in winter time? I had symptoms free for about 4 months since last Octorber, but now I suspect it's purely the reason above, not necessarily because of anything I did. If so, as weather gets warmer, they will be active again, I'm saying so is because I am having a fare up right now. I would like to hear about your thoughts. Thanks!