Babies!!!!
I can't say I held mine much when that young. (Just enough to make sure they all their limbs.) I usually mated does in pairs, so they would be due at the same time. I'd put a drop of vanilla on the doe's nose (to mask her sense of smell) and then swap babies if needed. Nine was the most I had a doe successfully raise. (11 was the biggest litter, but some were given to another mother.) I'd probably keep all of yours with the mama. If the small one gets smaller, then pull it out to bottle/syring feed. I did that once for 4 rejected bunnies. Three made it. It took a lot of TLC, but as a young teen I found the time & patience to nurse them with KMR. I wouldn't recommend trying it. It's truly a last resort kind of thing. (It took a few frustrating days for them to learn how to use the eye dropper. Also, the mama helps them urinate, so I had to use a warm wet paper towel to ..... But again, I had no other option because the doe kept kicking them out of the cage.
Also we are definitely hoping to get into the groove of having two does kindle at the same time for that purpose. Currently the blue doe is the only one we have that is old enough to breed. We are waiting for them to be 6 months before breeding.