Congratulations
1. No nest boxes, nooks, snuggle huts, hideouts, tents, and all other things they can get inside and snuggle and nest.
2. buy a set of dummy eggs - they will make your job easier.
3. Have the birds on a 12/12 sleep cycle. During the day, be sure the light is bright (so if yo u live where the weather is poor, maybe buy a light). At night, cover the cage and try not to wake them.
4. If you ever get any eggs, take a dummy egg in your hand, go to the egg, drop the dummy and grab the real one. Eggs are laid every 24-48 hours until the clutch is complete, usual ly 3-7 eggs, though clutches to as many as 12 have been recorded. You can allow them to sit on the dummies for up to, but no more than 21 days. If they leave the eggs alone before them, or abandon the nest (you will know this because the eggs won´t be together in a hudle, but sprawn all over) then remove all the nest, eggs, any nesting materials, then ¨shuffle¨ the cage (move perches, toys, food and water bowls around), add in a new toy and some foraging activities, and be sure they are getting 12-13 hours undisturbed sleep.
5. Try to keep the cage floor clear of clutter (shredded odds and bobs, papers, remanants of shredded boxes etc) so that if any eggs are laid, you spot them quickly. Thought you do have a good few days to remove them before any egg development happens.
6. Don ´t let your hen sleep in the food bowl. If you see that, buy a new bowl that she can´t get inside.
7. Be sure your hen gets calcium daily one way or another, be it pellets, calcium rich veggies (as long as she´s getting Vit D3 from somewhere, either unfiltered sunshine or pellets), or a supplement (those are usually a weekly dose).
this is all I can think of off the top of my head