from what I am reading - it seems as if the does, may lose the litters, if dosed. But it seems as if it can cause sterility, so they may not have took... no litter to lose. The exert I posted, does not recommend dosing babies.
- This lady you bought the bucks from, can you ask her, subtly, how the sire of those babies mates? If something has happened to her rabbitry, she may not have mentioned it, thinking that it did not get, to the rabbits you have. It may change her timeline. It may cause a mess, though. It seems as if you can clear it up, with antibiotics, and then see if you can take a swab, and have the vet test it, once you think they are clear. Would save you an office visit.