I've managed to capture two of the cuties and put them in a pen, but when I approach them with bread and click on them, they don't get in the mood. Help?

Did you had them breed recently? Do they show hearts after being feed?

Otherwise, I've spawned yaga hogs or found some, and feed them bread and they breed for me.

I can't seem to reproduce the issue on a fresh install on my test instance. What version of the mod are you on (after the minecraft version in the jar's name or in the mod options menu) and what is your mod list ?

Uh... I have animania... that might do something? I dunno.

Give the complete modlist please, might be something you don't suspect.