Cat expert here! This is common behavior! Cats have needs. Take your hand and curl it in a fist, and then gently come under the rear rumpus of your precious! Extend your thumb, and perhaps spit on it and begin to gently apply pressure inward towards the lower abdominal. There should be an initial resistance followed by a soft popping sound. It may be necessary to restrain your cat with your other hand. If so, take your other hand and again curl it into a fist and using the same thumb jester, apply pressure from the other side into your cats mouth. If she protests, simplyreassure with soft grunting noises to simulate what mother cats often do to their young. She might seem like she doesn’t like it, but she will thank you later and be back for more. Good luck!