Well, in my mind, bunnies are just like cats. You got to play with them, feed them, and of course, clean the litter box. (Yes bunnies learn to use the litter box). I think bunnies could go for a few days without their food being replenished, I would recommend a big feeder you put on the inside of their cage. You refill it from the top and the pellets comes out at the bottom and if you get a big enough one, ones that I've seen anway, say they can go up to 5 days. But that depends on how much the buns eat. They also need fresh vegetables every day. And lots of timothy hay to help their digestive tract. Only feed bunnies alfa products if they are under a year old. Older bunnies don't need as much calcium as younger bunnies. And even if one of them are nuetered or spayed, get the other one neutered or spayed because bunnies can develop uterine and testicular cancers, and plus it helps with behavior problems, such as accessive digging and chewing. Make sure you have enough toys and chew things so your bunnies don't get bored. A great site to check out is www.rabbits.org