Hi all. If you haven't seen her before, this is my cat Ziggy (her shelter name was Emily). She's been with me a little over 2 years now and she's super affectionate. About 2 weeks ago, I noticed a mat in her fur on her back. More recently, I've noticed that her fur feels kind of sticky instead of her usual soft fluff. Once I started thinking about it, I can't recall the last time I've seen her grooming herself. She certainly hasn't done it since I've been paying attention, but at the same time I'm not watching her 24/7. I'm not noticing any other behavior changes, she still eats and drinks fine and uses the box. She is quite active and loves both playtime and snuggle time. She grooms Freyja (my other cat) from time to time. She used to let Freyja groom her, but I haven't seen Freyja try this recently enough to know if that behavior has changed. She's never liked me brushing her.
I took her to the vet, who did an exam and suggested watching for behavior changes. Her exam was normal including her temperature and heart rate and she has kept the same weight. She has a history of pillow foot which has been in remission for about 18 months (her behavior at that time was decreased playfulness and limping). I'm trying to encourage her to be brushed, right now just letting her rub it with her face and giving her lots of treats just having it in my hand and gradually getting her used to it. I'm worried that this is her way of telling me she doesn't feel well and contemplating asking the vet for bloodwork. Does anyone here have input regarding grooming behavior or lack thereof?