Does anyone else have this problem of their cats fighting more during the Spring? I have two female cats, Ruby & Hazel (I was told they are mother and daughter and that they fought before I got them). They are both also meowing more and playing more (getting the zoomies). But the problem is the fighting and them waking me up with the zoomies and meowing. I'm sleep deprived. AND, I'm not 100% sure they are spayed. I have taken them to the vet and asked for them to be checked for spay scars and the vet couldn't find any scar on either of them. But she felt Ruby's abdomen and thought she could feel a space where the uterus would be, so she thinks Ruby is probably spayed, but NOT SURE. Hazel is overweight and it was impossible to tell. Neither cat has any tattoos or tipped ear or anything. I have seen other cats in heat and know the general signs and behaviors and indicators, and I have not seen Ruby or Hazel exhibiting the classic signs of being in heat. But I've also read that some cats just don't show those normal signs and behaviors, but they still go into heat. I have noticed that my cats go through phases where they fight more and then the fighting decreases again. I am now wondering if this is due to one or both of them not being spayed. I used to think it was the full moons and the daylight hours, but now I'm not sure. I have only had them for just over a year and I remember them fighting a lot more last spring, too. They are about 4 or 5 years old now (the vet's guess at their ages). They are indoor-only cats. They are rescues (they had been abandoned by their owners) and I don't know their history before I got them. I have not seen any male cats hanging around the house at all outside, but years ago I had a newly-rescued cat that went into heat after weaning her kittens and I didn't see any male cats hanging around outside then either. So, I would like some opinions....is this just a case of Spring Fever? Has anyone else noticed that their cat's behavior changes in the Spring? Or do you know how the heck to tell if a cat is spayed? Does anyone have experience with the "Spaycheck" blood test that checks for AMH? Hazel is the torbie and Ruby is the orange tabby. Ruby is the mom.