YOU SAID:
the cat is having a really really bad like, amazingly bad diarrhera
INTO JAPANESE
猫はひどい下痢をしています
BACK INTO ENGLISH
My cat has severe diarrhea
INTO JAPANESE
私の猫はひどい下痢をしています
BACK INTO ENGLISH
My cat has severe diarrhea
That didn't even make that much sense in English.