behavior change after kittens born

Question
HELLO,MY OUTSIDE CAT HAD A LITTER OF KITTENS AND NOW SHE'S BEEN VERY MEAN AND FIGHTS WITH MY OTHER OUTSIDE CATS,DO CATS HAVE POST PARDUM OR WHY THE CHANGE WHAT CAN I DO,HELP PLEASE

Answer
Your cat is protecting her territory and her young. The only thing I recommend in this situation is isolating her and the babies inside the house until they are old enough to be on their own, eight weeks. This will keep mom from fighting the other cats and it will keep the kittens from becoming wild, or feral, due to lack of human interaction.

After the kittens reach eight weeks, get all your adult cats spayed and get those kittens to good homes.