Hi, one of my girls was spayed 2 weeks ago. She has been well but I have just noticed, after the boys have been chasing her, that there is blood on her "flower" as if she is starting a season.
I have quite a few years ago and it was because the bitch that was being spayed was just about to start her season and I didn't realise. I would get her checked though as it can also be sign of infection.