I've heard mixed information about pyometria so I'm wondering if anyone has had any first hand experience with it? On here I've heard that pyo is common if a cat is left unspayed and goes through multiple heat cycles. Is this due to not ovulating which causes an infection or an open uterus which causes an infection? When I asked the vet about it he said that cats that are unspayed usually only get pyo 1% of the time and that it's much more common in dogs because they're more open. So any info you guys have would be great!