How will I know when it is time to put my cat down? She is eating and still has bowel and bladder control. She however, is having a difficult time "talking". She always had loud vocalizations, but now it is a struggle for her to even let out a meow. She sleeps and spends 95 percent of the time in her Kitty condo but she has always spent alot time there (it is under a skylight) She is 16 and 1/2 years old and sometimes looks very feeble and at other times not feeble at all. and I am a mess thinking about this decision.