Change In Meow
Male or female cats tend to be at their worst behavior during mating season. Female cats “in heat” will look for a mate so they’ll start rubbing on furniture more and being more sweet than usual, but they also tend to meow in loud, coarse voices. So, if you have a cat that’s locked up indoors all the time, it might get aggressive as it wants to go outside and meow loudly for a mate.