I have a 13 month old 650 gram male bumblebee that has been producing sprem plugs for a few months now. I had been pairing him with my 2000g proven female Pastel starting a couple months ago. He seemed completely uninterested and has not shown any interest in her. I decided to try him with one of my 1300g female Pastels and saw a lock within 24 hours. I paired him with the smaller female again the next week and saw another lock. This week I tried him again with the 2000g female and again have not seen any interest. At first I thought he was just still not ready to breed yet but confuses me that he locks with the smaller female? Any ideas on what might be going on here?