Triplets are well known for fighting, each wants the best nipple so it’s not uncommon for the bigger kit/s to bully the smaller ones away from the one they want. If that happens rotation is the best option, the larger two first & then the little one alone for a longer period of time to give him/her the chance to catch up in size a bit quicker. I weigh kits every day for the first month to make sure all are gaining, after that a few times a week is fine. Male kits will need to be removed from mum at around 8 weeks or 200g, whichever comes first to prevent them breeding with mum.
Alfalfa will help milk come in a little faster, so far I’ve never had a female go more than 24hrs without milk when alfalfa has been readily available, the fastest it appeared was 12hrs. Kits may drop a couple grams in weight while waiting for milk to come in, but unless they’re very small in weight at birth it shouldn’t be an issue. Since the kits are born with all 20 teeth they can also start to nibble on pellets & hay from birth, so don’t worry if you see that & just let them get on with it.
Mum will have no doubt eaten the placenta’s so offering a good sized goji berry or single raisin will aid in boosting energy levels after birth & help with digestion of the placenta.
Bare in mind though that females come into heat around the time of birth, so if the male wasn’t separated in time you could be looking at a possible breed back situation where she could already be pregnant again. For obvious reasons it’s not ideal for her to be feeding & pregnant, as she’ll need her energy & nutrients to maintain feeding. If a breed back has occurred & it disrupts her health to the point where she’s dropping large amounts of weight, or her milk production slows down to the point that hand feeding is needed, goats milk & water mixed 50:50 works well, though most kits from larger litters that I’ve hand fed won’t entertain it if it’s cold, so you can warm it up slightly to make it more appealing to them.