zukgod, all goats have worms. If yours are happy and healthy, they probably do not need to be wormed
yet, in my opinion. At some time, though, they will.
Many herders use the color of the inner eyelids as a gauge. See this:
https://www.uky.edu/Ag/AnimalScience...etter01704.pdf
The goats get anemic as the worms feed on blood, so the inner eyelid gets whiter as that happens. If your goats have nice pink inner eyelids, that's a good sign.
Or if you wish, you could have a fecal float done by your vet. Bring some goat berries there, and they will tell you whether you have too high a worm load. You can also learn to do this yourself.
Tolerance to worms varies widely in goats. Yours may be more tolerant. Additionally, goats in pastures where they can eat a lot of tannins from leaves or high-tannin grasses fare better with worm loads.
Likewise, worming practices vary widely by producer. One thing you want to avoid, though, is worming practices that cause drug-resistant worms to become dominant on your pastures. There is plenty you can read about all that on the Net, or ask your vet, or both.