A couple of days ago, I heard one of the princesses sneeze. After spending some time to observe, I found out it was Phoebe. The next day, it was Piper. She became quieter and didn't meow for attention as much as she normally does.
Yesterday it was Prue's turn. She seems to get it the worst, because the sound of her meows sounded like she's got a cold and she was even sniffing on top of the sneezes. Poor baby.
Do I just leave them be and they'll get well on their own or do they need vet attention?