HOLY COW, that's a lot of worms. Good thing she's in your hands!
I would not be surprised if they started losing kids and decided to finally deal with it.
I've actually had to worm a bit here this year. Probably no where near what you've got to do, but I was surprised. It's been very rainy and wet and humid. But we'll see. It may be the only time or two this year.
Were they all tapes, by any chance? I feel like I've read something about kids and tape worms early...
Its bad here also but most of our sheep can handle a load. One of the fecals we ran today showed an egg count of over 4000 in one of the wethers so I'm actually surprised he lived long enough to get wormed. He is on the small side which is why he is a wether.