pregnant sister kitties abnormally agressive
I have 2 adult female cats, sisters from the same litter. They have always gotten along well together, sleeping together, grooming one another and even shared kittens on their last litters. However, they both became pregnant at nearly the same time and as their pregnancies progressed they have been smacking at one another and becoming more and more distant. Three days ago one of them had her litter and the other is very close. Today the one who has yet to have her kittens has become extremely agressive with the other. She hisses and smacks whenever the other one passes her, growls if she's with my husband or myself and the other cat comes near, and seems just generally angry. Anyone else that has experienced a similar issue please let me know, will this behavior change after the kittens are born? Is it normal? PLEASE HELP!