I HAVE 3 6 MO OLD KITTENS 1 BOY AND 2 GIRLS, 3 DAYS AGO 2 OF THE 3 STARTED THROWING UP WHITE FOAM BUT THE WEIRDEST THING ABOUT IT IS THEY ARE THROWING UP WITHIN MINUTES OF EACHOTHER AND THIS MORNING THE MALE A FEW MINUTES AFTER VOMITING PISSED IN THE HALLWAY ON MY CARPET,UP UNTIL THAT THEY ARE ALL BOX TRAINED AND THERES BEEN NO PROBLEMS UNTIL NOW.