Just out of curiosity...

Is it possible for a female to be able to breed at around 1000 grams? I know the general consensus is about 1500 grams, but I've noticed that my big female is exhibiting behaviors that would possibly indicate she is perhaps producing follicles?
Keep in mind I have no intention of breeding her, she's just a pet but I have noticed some changes in her behavior recently that has me curious. Seeking out the cooler end more often, which she has rarely ever done is the most noticeable difference in her behavior. Obviously this could just be her wanting to take a break from her warm end, I just have been curious as to whether or not it was a feasible theory.