So sorry to hear about Sasha. I'm a cat lover and have had several. It must be very hard under such sudden circumstances.
Common wisdom dictates that if cats/dogs are to be paired, they need to be raised together from kitten/puppy hood. Chloe is thirteen and already set in her ways.
We introduced Charlie (three month old kitten) when our first cat Sophie was age six. She rejected him at first then merely became 'used to' him, but for the most part she ignored him. As Charlie got older, their occasional interactions resulted in squabbles that often ended with a lot of hissing and growling. Needless to say, we were disappointed because they never really bonded.
We were heartbroken when Charlie died at age ten since he was such a sweetheart of a cat. To our surprise, Sophie went from room to room looking for him and meowing loudly. This went on for several days. Obviously she missed him badly, so the lesson here is that you never really know.
Sadly, our beloved 'cranky' girl Sophie died last year too, at the ripe old age of 21.
You know your Chloe better than anyone and how she interacted with Sasha when he was alive. If she's a quiet, mellow, submissive cat, she's more likely to accept an interloper. If she's feisty, assertive and territorial in nature (an alpha), I would think twice about it. If you do decide, she's more likely to accept a small kitten. An older cat will likely be viewed as an intruder.
Best, Willa
SNP and Greens end coalition deal
Scottish political mess. Is Devolution working?