I have 4 cats that are 1.5 years old. They have decided they don't want to eat much, some have had runny stool and some vomiting - though some of the vomiting was hair balls. I gave all cats 1/4 Pepcid. They are turning their nose up at all foods. I have given all different kinds from fancy feast to pricey options. Not sure what do do. 3 of the 4 have nibbled on some food today. One that was fine yesterday doesn't want to eat today. I am at my wits end.