Random but Interesting Animal Fact

Cats and rabbits are what we called "induced ovulators." This means that unlike dogs and humans who have cycles and specific times when they ovulate, these other two critters only do so when they are stimulated. They still need hormones to regulate all these things but this is why cats go in and out and in and out of heat until either bred or spayed.  AND why they can have a litter fathered by multiple dads (for a short window of time). 


It's little barbs on the end of the male cats penis that do this. Also interestingly, after neutering these barbs go away. AND why you hear female cats (even in the wild large cats) scream/yowl/howl when the male pulls out.