I am in the US, but I live in Texas and we have been having 75 degree days, and my other mares are cycling, however I haven't had them checked by the vet yet because I didn't have plans on exposing them to the stallion until April. I went ahead and put her with him today because she is new to the herd of mares and one of my mares is aggressive with her... it just worked out that way. On another note, I am NEW to breeding (on purpose anyway, I did rescue a mare that had a baby about 3 years ago), but as far as being responsible, I go by all of my vets recommendations and I am in contact with him on nearly a daily basis. I have been a horse owner for the last 10 years, so I definitely don't know everything there is to know about them, but I strive to learn as much as I can on a daily basis, and keep learning new things every day. I asked the question because I wasn't sure if there would be follicles if she had been bred already, say 7 days ago for example. And I agree, she is a flirt... but she is a super sweet girl, and the lowest in the pecking order with the mares. I wanted to keep her healthy and safe, and he is super gentle and kind. They get along great and she seems happy now. She's a bit "overly friendly" with him, but its better than seeing my rescue mare bite and kick and run her around the pasture.