So I have lost two hens in the last week (button quail) because of being egg bound. Any ideas what could be causing it? I feed them gamebird and they get fresh water and oyster shells to peck at and dust in. That is the extent of their diet. I used to give them small bird vitamins and never had a problem with them. Should I start giving them the vitamins again? Please help I only have 5 hens left I love my wittle buttons they make delicious pickled eggs too.... HELLLLLP!