(I've added a reply to the bottom of this topic with the latest.) Hello, all, this is a topic to pass along some information that may come in handy for someone some day. Sieben's been laying eggs in the afternoon for a couple of weeks. These eggs have hardly any shell. At first I chalked it up to a few misfires. She'd lay normally for a few days, then back to the p.m. softshell. And she's been really draggy in the late afternoons. I decided to let the vet see her. Based on the exam and history, it looks like she's not getting enough calcium. There is no evidence of any other problem, such as parasites, tumors, infection, etc. The rest of the flock is doing fine - normal eggs, thick shells, plenty of energy . . . This confirms my feeling that ducks' ability to absorb nutrients is variable. Apparently also, some ducks and chickens don't eat free choice oyster shell. It's not just a matter of soft shells. Long term, calcium deficiency can affect other organs as well as the egg laying system. It can cause bone problems. But we seem to have caught this fairly early - calcium supplements have been started. I've worked to provide a good diet for the flock, and plenty of calcium. But Sieben needs a little extra boost to keep her healthy. Perhaps someone is wondering why just one or two of their ducks is having a problem. It may be that they need more of a boost than the rest. BTW, they don't eat spinach. But since they forage around, perhaps there's something she's eating that's interfering with calcium uptake. I'll watch her more closely in that regard, as well as give her the supplement. Update as of 6/17: Our technique for giving her the liquid calcium has improved. Beloved holds her differently - rather than two hands around, it's one hand under and one over. She's more calm that way, and somehow it puts her in a better position for me to hold the bottom of her mouth open from underneath (I do not ever want to hurt a duck - so I err on the side of being too light handed). I gently press where the bill meets the feathers. Very gently. Once she opens her bill slightly, I can slip the dropper in. We also changed from a plastic syringe to a plastic dropper with a long tapered end. I can get that into her bill without having to press it open very widely. These are the kinds of details it can be difficult for me to find when I need them, so I'm posting them here and hoping it helps someone else. Wish I could make a video, but holding the duck and giving her the liquid takes both of us, and all our concentration. And I don't know how a person with a camera would be able to get in close enough to see what we're doing anyway! It's quite the little family huddle. Regarding possible calcium uptake interference - she may have ingested some (not much) rhubarb leaf, as I have two plants at the edge of the yard. Gag! Very high in oxalic acid, a calcium blocker. I have fenced off the rhubarb plants, just in case. Two soft shelled eggs yesterday afternoon, so we have not yet resolved the problem. But we continue to work on it. Twice a day with Sieben, and night time calcium boost for the flock. The sixteen ounces I place in the veranda is gone by morning. Someone is drinking it, and I have seen Sieben take a few sips. Onward!