Newborns-8 days- runt?

Question
Hello-
   I have been browsing the net for days to find out all I can about newborn bunnies. You see, my supposedly male bunny just had babies. I was surprised, but not unprepared. I had researched  about rabbits when I got my dwarf "Blackjack"(whom I was told was a male). When I read that they like to live with other bunnies I went and picked out my second Dwarf bunny "Oddball"(a male as well). Blackjack is now 1 and 2 months old while Oddball is about 7 months old. Anyway they got a chance to play together about 37 days ago and you know the rest. Surprise! 3 new baby bunnies. I am still in shock, but very excited. I wanted to get a few more bunnies anyway. And I will be getting all of them fixed as soon as they are old enough.
  Now to the point. One of the three doesn't seem to be growing as big as the other two. I figure it is either a runt or not getting fed as much as the other two. It is  definitely not a "peanut."  Today(day 8) the size difference was quite noticeable. So I put mama Blackjack and lil' bunny in a snuggly box alone together for about 1/2 hour. I petted her so she would be calm and let the crying baby feed a bit. It went well. The baby finally looked a little bit rounder like the other two. I was just wondering if this was a good idea and if I should keep putting them alone together if it looks like the lil' one needs it? Please let me know what your advice would be.

Thank you- Jackie

Answer
It is a good idea to help the little one out, but be careful about when you do it. If you do it before the others are fed, the mother may assume she already nursed the babies, so she doesn't have to do it again. If you don't know what time she nurses them, it would be best to just take over when they are nursed. Take all the babies away from the mother, and put them in with her once a day (or twice, depending on how full they get the first time and how quickly her breasts refill with milk; if they get quite full and her breasts are not swollen with milk, once a day is enough). Then you can monitor how full each baby gets and take away the fullest ones first, then let the little one nurse longer.