reading here in regards to heat cyles brings me to ask this question. When, or better yet, at what age do females actually start having these heat cycles? Also, if spayed, does this prevent from having the males "hump" the females? The only sure thing I know, (maybe, LOL) is that females give off this scent that attracts the males and they go crazy trying to go after the females. Any info of course will help. Many thanks.