I hope it's ok to piggy back onto this thread, as I have an ongoing problem with one of my pullets.
Back story: I treated her for salpingitis, and she seems to be doing fine... except she now lays no-shell eggs. There's a grit of texture to the membrane, but the last two have been laid overnight from the roost. I don't know whether another bird broke them to eat, or if the fell and broke.
Calcium citrate is the better option for a short term problem, but for a hen that isn't getting enough calcium in general, I would be looking at calcium carbonate. In my experience regular shell less eggs are symptoms of other problems unrelated to calcium intake.
I've been giving her pieces of calcium citrate, with peanut butter (thanks for the tip, @azygous, as she loves them). I tried the "pull the wattles down and stuff in the whole pill," but she would thrash and it was a big struggle. Then she would avoid me.
It's been over two weeks, so I think I'd better stop. I'm getting about 250-300 mg calcium citrate + D into her per day. ALL the birds love the PB, and it's difficult to get them to the right one.
Calcium citrate has half the calcium as calcium carbonate, but the citrate works twice as fast. Due to these different properties, the citrate form is what we want to use in an emergency because of its speed in absorption. The carbonate has much higher calcium content so it's what we want to give regularly to keep calcium levels at optimum levels in our laying hens.
So, I'm thinking I should get some calcium carbonate, and switch to that? Can I do that long term?
I feed Kalmbach 20% flock maker with both oyster shell and egg shell on the side. All the birds seem to like egg shell much better than OS. I'm almost out of egg shells, as a matter of fact.
I am thinking of switching to a layer formula for the calcium content, and finding a way to give them a bit more protein. Or mixing the two. (My rooster died last weekend, so I don't have the rooster/calcium issue. RIP, Snowbird.)
Suggestions on what to do?
Make a paste by adding a little water to the calcium carbonate. Make some small cubes of bread about one quarter of an inch square and soak the pieces of bread in the paste and offer it to the hen.
Filing this idea away, thank you.