Calico kittens & cats in Vandalia, Illinois

Kitty is 15 years old. We have had her since she was a kitten. She is not a lap cat and prefers to come to you for attention. She enjoys laying in her cardboard bed, or her pineapple house. She is content to hang out by herself most of the day, but she likes to snuggle at night. She has never had any behavioral issues, and is litter box trained. Within the last 2 months, our younger cat has started to attack her out of nowhere (they have been house mates for the past 7 years with no issues). Where Kitty is on the more shy side, our other cat is very outgoing and bonded to our daughter, which leaves me with an impossible decision. I would love for Kitty to find a home where she can enjoy her last few years without being threatened by other cats. I think she would do very will with another senior cat.