Is this dairy goats or pygmies?
If dairy - and you have the means to - I would milk in the case of triplets anyway. Then you can a) see what she gives in 24h and b) divide amongst your kids equally and if necessary use replacer (like Caprilac or Lamlac) to top up. Most dairy kids will do best of given about 2 ltrs milk for the first few weeks, so with triplets it is unlikely that they will get that from the dam alone.
A bottle of Vecoxan (available from most agrimerchants, just tell them it's for sheep, or your vet) in the med cupboard is good to have, it can be added to their milk bottle (you need to weigh the kids though, as accurate dose is quite important) and - if given at the first sign of lethargy, kid hunched up, possibly lower temperature, not interested in food, diarrhoea often only happens a bit later - brings them back t normal within 24 hours.
One thing to watch out for re kids off colour - if you come into the goathouse and find that one ((or more) of the kids have "slittey" eyes - as in their pupils are narrow where everyone else's are dilated, then that is often the first sign that something is amiss...
Hope your girls will kid normally soon, but they do it in their own time!