Thanks, arnie! Yeah, I'm aware of that limiting factor--they won't even go indoors if they're "too hungry to think about that!" LOL But, they're breeding now--so I don't know what it was. Maybe I just didn't try enough times. Maybe I caught them all in the wrong part of their cycle. \:D Maybe they ate something that limited their fertility? Dunno. But it seems to be fixed now. \:\) Thanks for all the help!