I'm in Ireland, Europe. To prevent her from laying she'd need to be kept in around the clock for about a week. Then you could gradually let her out for an hour here and there. It's much easier to get her an implant. Total pain in the ass having to keep them in the dark all the time, plus they hate it. Far as I know some vets do implants and an avian vet definitely will. And tbh if she is laying internally it will be about the only chance you have of saving her. You're at nothing without the implant when this is the case, unfortunately. Check her for temperature. Thermometer inserted into the vent. Normal chicken temperature range is between 40-42°. They don't always show temperature with infection but most times if they are very sick they'll come in over 42°. Also check abdomen for swelling. If it feels hard this indicates abdominal swelling due to infection. If it feels enlarged but fluidy you're looking at ascites from something like egg yolk peritonitis (which is one type of repro infection they get) or repro tumour. Above checks will give you an idea of whether or not implant is warranted.