Quote Originally Posted by krazyaboutkatz
UhOh!!! Hopefully it isn't what you think. I've heard of females going into heat as early as 5 months but I would think that you'd know if Cali was in heat. She's be making loud meowing noises and rubbing her body all over everything. She'd also be very very friendly to everyone. I'm not sure when males are sexually mature but I always thought that they matured a bit slower than the females.

I know in the past I've caught my cats doing this and they're all spayed and neutered. I found out that it's just one cats way of acting dominant over the other one. Maybe that's all it is. Good luck.
Yep, you've confirmed it, Cali is in heat, at just under 5 months of age.