The only answer is to rebuild your coop with lumber and hardware cloth or keep them inside.
Anything can get through chicken wire.
Can you post pictures of what your coop is so we can help you fortify it?
What have you used for worms? Whats her diet? Unless you suspect an infection is causing the issue, baytril will not help. Is it just liquid diarea or white gleet?
Then you might have absorbency issues in your flock, giving larvae in place of oyster shell isn't sound animal care and *will* kill them with low calcium and all the extra fat. It's not nutritionally safe.
We can get down to your birds issues. What's your birds diet? What breeds?
They could still be soft moltin, it's usually not noticeable.
As previously mentioned, it's also a huge change of environment and the end of the laying season.
since they need 14ish hours of daylight to produce the laying hormones to trigger laying, it will be about February before that...
You're welcome.
They won't lay until spring (February ish) if they're molting+winter break.
For future note, if you plan on adding chickens from local sources, always quarantine for a month as far away from your flock as possible, not even dander should reach your established flock from new...
Chickens hate change and on top of that, they don't feel safe in their new environment, they won't lay until then though winter will likely be on its way out when they get around to it.