Last Friday, my dad bought me two bunnies, male and female. It's my first time to have bunnies as pet and I noticed that they eat a lot. Is it normal that they eat all day? I give them a ball as a toy since I saw in Internet that they should have a toy like a ball but they just ignored it.
How many hours should I don't give them food? At one time I forgot to leave them food for three hours and when I come back they are really hungry. Should I give them one hour gap for them to digest their food? By the way they are already two and three weeks old. Tips will be appreciated.
Rabbits should always have water to drink and hay to eat. At this age it's okay to let them eat alfalfa hay, but once they are over 6 months switch them to grass hay (Alfalfa will predispose to obesity and bladder stones). You can feed them (grass based) pellets a couple times a day but the total amount should not exceed 1/8 cup per 4-5 pounds. In addition, you can give them 1 cup of mixed vegetables per 4 pounds. As for treats, you can use prepackaged ones from the store or fresh fruit, but only give 1-2 tablespoons a day. They groom themselves a lot like cats and get hairballs, so it's recommended to give them fresh pineapple 3 days in a row each month to help them pass it. Rabbits can die from GI upset (bacterial imbalance), so when changing food (as in the different hays when the time comes) do it gradually over a week.
Definitely get them both fixed (for male: 3-4 months; female: 5-6) as it will help their temperament immensely, eliminate any chance of uterine cancer, and SHOULD allow them to be housed together (Female rabbits are notoriously aggressive to males entering their territory, and I'm not entirely sure spaying will solve that problem so monitor that closely).
You should start getting them litterbox trained at this point, too. If at first they don't want to use it, begin placing their feces in the box yourself when you clean the cage. They're clean animals and will want to keep their poops away from their eating and sleeping area. That way it will be less stressful to let them run around the house when they're older (well...maybe the idea of picking up poop from my floors is only stressful to me...).
Ah, well, that was more than I had originally intended to say, but I kept remembering more things... (Thank you Dr. Vincent/Exotic Animal class ...)