Just went outside and found my 3 1/2 mo flemish giant buck outside of his playpen. He was safe and sound, but he was next to my approx 4 mo flemish giant doe. She was tethered in her harness. I didn't want to have kits, in fact was getting ready to take the doe in to get spayed. Are they old enough? I haven't seen any signs of "maturity", but have never owned rabbits before. Yes, I'm clueless.