I am a first time cat owner, having adopted a "teenage" stray. She is a calico and we love her already. We have had her for about two months. We took her to the vet for the first time on November 22. She got a clean bill of health, immunizations, and is being treated for some ear mites. Lately she is sleeping a lot more, lethargic, and not as playful. She also has a weird "meow", it almost sounds like she is hoarse. Should I be worried? Thanks in advance for any advice.