I picked up my stud male last year around this time. I started cooling Novemer 15th as I usually do. A month later he would not hook up with my Girls. After a month of trying I gave up on him and went to plan b. I decided 6 weeks later to give him another shot and bam. He was a machine and locked up with 5 of my girls and father 4 clutches. Last one hatched this week. My point is anything can happen. Sound great if they are locking up, I would not worry too much