I'm sure they'll bond OK. Tucker will still be young and possibly not as set in his ways when you're ready to bring the other little one home. WOW!! Two babies close together...oh the fun you'll have at your house!! As for the testicles, I know Piper's hadn't dropped yet when he was 12 weeks old. They'll come, don't worry. One day it'll be like BAM and there they are!! I read you're getting a girl. If they look like your Tucker send one my way!! LOL