My almost 2 year old Calico cat has given birth to 2 babies. One of them has sadly passed away.. the mother rejected her and i was bottle feeding her. She started to do this weird thing where she would spazz out then go limb. She passed at 2 days and 6 hours old. Now her brother has started doing the same thing but this time he stopped breathing. My mom got him breathing again but now when he breathes there's this popping sound and he's kinda breathing with his mouth open and from the stomach instead of the diaphragm, it's also slow like he's having problems. I don't know what to do..