If she is egg bound again try the calcium citrate with vitamin D in the picture above. Walmart, Walgreens, Target all sell it, and generic is good. Has she lasts any too large eggs or had her vent area pecked? Things like that, and egg binding can damage the vent, thus making it harder to lay.
Is she molting or not? Is she coming out of a molt? Molting hens do not lay eggs. I don’t think she should be egg bound if she is molting. If she is done, and egg bound, then give the calcium citrate with D tablet.
The vitamin D is given in the calcium tablet to help. There is D and calcium in the feed, but when one is egg bound or having shell-less eggs, calcium plus D is the treatment to help increase muscle contraction. I don’t recommend giving D alone, or putting lime in the feed. There are different...
Calcium citrate with vitamin D tablet should be given directly into her beak to swallow, while holding her, and then hold her still until it goes down. You can give one tablet daily if she is egg bound. Does she have any constipation? You are not doing her any favors by feeding grubs only. She...