My 16 month old Buff Orpington hen seems to be having trouble laying. She's still out and about foraging but I'm wondering at what point do I need to intervene as far as a warm Epsom Salt soak? She lives with 4 other hens and I've yet to discover who is laying which egg. Some girls are molting and Darla, the BO, is beginning to molt. I know that she's having trouble laying because she keeps going to the nesting box and she'll sit for a while, sing her song, and then leave to go forage a bit, then repeat. I just gave her a tablet of Calcium Citrate + D3(630mg/12.5mcg). They eat Purina Flock Raiser and Nutrena Hearty Hen. They have access to grit and oyster shell. Her vent looks normal right now. Thank you for your time and sharing your knowledge. I really appreciate it