Lupron is safe. However, it doesn't work in all birds, so just keep that in mind. We tried with Rio, and it didn't put a dent in her egg laying. However, we were able to manage her laying a bit via environment and contact. During the 'laying' season for her which is around summer and spring she begins to get a bit, umm.... exuberant in her self pleasure. When we see that happen, she gets 7.5 hours of sunlight a day. Absolutely no more than that. It's also the only time of the year that she gets covered, and we go complete black out, or as close as we can get with her. We also refrain from touching her back - head scritches are all she gets. We don't let her around any mirrors, either.
It's worked for us. *shrugs* I would suggest the Lupron to see if it works, but I would definitely suggest that you begin limiting her sunlight to about 8hrs a day.
Littlefoot - Pied Male
Link - Cinnamon Pied Split Hen
Terra - AmStaff
Mocha - Tuxedo Kitty
Kira - Psyco Schitzo Kitty
Rio - Whiteface Hen (1999-2010)