Is human baby formula safe for feeding a week-old baby bunny?

I think the bunny looks fine. Just because it is smaller does not mean it is not healthy. You can add goat milk (regular, not low fat) to the kitten milk replacer and a pinch of acidophilus (aka Probiotic) to the formula to promote healthy gut flora. Formulas vary depending on region. Avoid Esbilac and any puppy formulas. FEED TWICE A DAY ONLY and let them have free choice alfalfa hay. At 3-6 weeks of age they should be eating about 13-15 cc/ml each feeding (two feedings a day) but it may be LESS depending on size of rabbit so they little one may only eat 8-12cc. That is OK. Hope this helps.

That's fine, as long as they are kept warm. Does (female rabbits) typically nurse once or twice daily. The kits (bunnies) will begin munching on hay within the next few days. They can eat alfalfa (until 7 months of age), timothy hay or oat grasses and fresh vegetables in addition to a commercial pelleted diet.

Lowfat cow's milk does not have the appropriate nutrition profile for baby mammals. I recommend kitten milk replacer. If you do not have access to kitten formula, you can make a homemade formula: 1/2 cup whole milk 1 egg yolk 1 drop pet multi-vitamin 3 crushed Tums (antacid) Mix in a blender and replace every 2-3 days. This homemade formula should only be used until a balanced pet formula can be obtained.

You will need to add some heavy whipping cream to that milk for it to be suitable for rabbits. I suggest you refer to this article on how to care for baby rabbits. ( https://www.mybunny.org/info/caring-for-newborn-baby-rabbits/ )

Does are usually great mothers and will take excellent care of their babies. Keep in mind that baby bunnies can safely go 1 - 2 days before getting a full ‘meal.’ This is a protective mechanism since in the wild the doe might need to stay away from the nest for a while to avoid leading predators to her kits. Mother rabbits only ever feed their kits once a day, rarely twice, and that for just 5 to 10 minutes. In this short time frame, the kits get their whole day’s milk supply. So, if you never see the doe go near the nest box, but the little kits have round tummies, everything is fine. You don’t need to help nature along. The doe is doing her job while you’re in bed asleep. If you find that she is not feeding them at all after 2 days then refer to this link to an article on how to raise orphan bunnies. There is a recipe you can use in their to make formula. Hope this helps. Best wishes.

Kitten milk replacer (KMR) or goat milk should be fed to nursing kits (baby rabbits​). Feed twice daily. Be aware that bunnies can be very difficult to hand raise. Follow the link for more information. http://rabbit.org/faq-orphaned-baby

Hello, again. There is hardly any nutrition in your homemade formula, & the rabbit will starve to death if you do this. If the baby rabbit is still nursing, it needs milk until it can switch to a herbivore diet. If you are unable to provide for the rabbit perhaps you can find a rescue who can properly provide what the rabbit needs. Thanks for using Petco Pet Education Center, formerly Petcoach.