This is totally not professional advice (lol, maybe not even helpful ), but I'm all about going with your gut. If she's acting like she's ok and you're not overly concerned, maybe wait it out a bit longer. If you're really getting concerned, go in 'for a peek.'
Congrats on the the newest kids btw. They are all cute as can be, but Pearl, what a beauty!
That is a great question that hopefully a more experienced goat breeder can answer very soon. I'm guessing an undilated cervix??? I'm only on kidding season #3 and I've never reached into a goat that wasn't ready. Hoping someone can share this valuable bit of knowledge...
If her cervix isn't dilated then you will hit a dead end (and you won't be able to get much deeper than just past your wrist). If she is dilated, then you will be able to reach much farther and you may feel feet/nose or a water bag.
When i went in (super small considering the size of the goat), it took me 2 seconds to know something wasnt presented right and 20 minutes to figure out why i thought that. He was unresponsive, in his water bag, and i was finally able to get in far enough to push him backwards as there was no feet. Once he was pushed back i was able to find feet and pull. Took us 3 minutes to get him breathing; he is skin and bones. In less than 45 seconds, she delivered 2 doelings who are a good weight and vigorous. The boy is in the house. Has fight but we are struggling to get him nursing, i habe nothing to tube him with and our highways are a mess. Going somewhere is not an option.
for the little guy, will he suck on your fingers- if so then slowly pull your fingers out while putting the bottle in. We were given this great advice this past week when our buckling wasn't interested in nursing the doe.