A couple of years ago we took on a neutered female cat, she was eight years old. She was one of a pair cats owned by a elderly lady. Cat had soiled in the house and her owner didn't want to deal with the mess etc.
The lady is now in her mid 80s and has been in hospital for a month and the outlook is bleak. We've been asked if we will take on the other cat. He is her litter mate and neutered, they coexisted happily previously.
Any advice on reintroducing the litter mates now they are senior cats? Will it work or be a disaster?