One of my girls has always had proper seasons, but I noticed yesterday that she is extremely swollen, but there is no blood at all.  Could this be a silent season?  She pushes herself into me when I stroke her back, but my boy is not showing any interest in her at all.  Bit lost as I have never experienced this before.

Hi,

My bitch started that but further into her season she started bleed. I wanted to breed her on that season so just used Pre-mate tests, fingers crossed for a good result. If you are unsure take her to the vets, my vets were really helpful :-)