The corn cob bedding is good, but if you have a bun that likes to dig...it'll get really messy. If that happens, just put some hay over your litter and it stops the rabbit from digging. We used "Care Fresh" for our buns when we had them. It worked really great.

We had our buns in our apartment and created a false floor; plywood with hinge in the middle and office carpet attached to it (we used a staple gun). I protected our carpet and they were able to be as messy as they wanted. We had a "Bunny Condo" they could take refuge in or under and had two litter boxes, one inside, one outside of the cage. To train them, just put one of thier poops in the litter box, they automatically know what to do. They are creatures of habit...

About the dog...I would advise getting a baby bun so that it gets used to having dogs around. Or, even better, rescue a bun that has been used to having other animals around. At first, you really need to supervise the animals a lot.

The site Karen gave you is excellent! It'll tell you everything you need to know about buns...good luck!!!