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Young bunnies dehydrate easily. You can give children's pedialyte, every 2-3 hours, if necessary. The bunny should be started on the pedialyte solution first and then increase the strength, and amount, of the formula with each subsequent feed. Feed just plain pedialyte for the first 24 hours. Then add 25% formula to 75% pedialyte for two days. Than make it 50:50 for two days. Then change over to formula and give pedialyte if needed.
Generally syringe feeding works well using a 1 or 3 cc syringe with a tip. You should be able to find one at a drug store.
Generally rabbit neonates can hold about 100 ml per kg body weight. So this one may be able to hold up to 6-7 cc per feed. If his eyes are open and he is nibbling on roughage, one formula feeding per day should be fine. You should be providing a selection of leafy greens and high quality grass hay just a few days after their eyes open. Dark greens, kale, dandelion, collard greens, etc. are good. Chop them up and offer.
You can add a pinch of powdered probiotics to the formula. Probiotics help put good bacteria back into the intestines. Fortiflora, sold at petsmart, is a good one.
Wild rabbits will wean by the time they hit 200 grams and are ready to release.
I hope this helps.
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