my cat Oreo had kittens last month and will be 4 weeks old soon. but she is acting like she is in heat and wont feed her kittens unless my son or myself lay her down and put the babies on her to nurse. but she is acting like she is in heat and is more interested in licking her genital area than feeding her kittens or caring for them. my other female,Kitty, has been helping groom them and sleep with them. but Oreo just goes around chirping or meowing, and when i pet her, her tail goes to the side, and she kicks her legs and her buts in the air. shes not acting like a mommy cat either. my male cat has also been doing nightly crying, and he has been trying to bite at and mount my other cats and the older kittens i have. so is this just a hormonal thing? or is it possible a nursing cat can go into heat?