Hi everyone, my kittens, Kula and Koli, brother and sister, just turned 4 months old. I have just noticed while tussling together - as they do a lot - Kula (boy) is biting her scruff with his teeth, which I have not seen him do before. I am wondering if this behavior could be the start of his sexual maturity and if maybe he has, let's say, "designs" on Koli? She is due to be spayed within the next few weeks. Do I have cause to be concerned until then?
Thanks!