We call these plants elephants ears, I'm not sure if they have another/proper name

I have several spots of these in the flower beds around our garden, every year the chickens devour the leaves until there is nothing but the thick stems left. They go crazy for any bugs they find around the roots and stems too. The plants always survive and bounce back and they have pretty pink flowers, similar to a hyacinth shape.
I had 9 eggs yesterday and 3 today! Prue wants to go broody, she's spent all day clucking and marching round the main house. She's been on the perches, in and out of all the egg boxes, sitting and putting straw on herself and then screeching and flapping and trying another location. I've barely seen her in the garden or run all day!
Black is laying again but same as last year with her eggs always having softer shells. This is annoying, I can never take her eggs quick enough from the eggbox and they leave a big sticky mess in there

the other hens huff and puff about laying there or fight to eat the eggs. I've bought calcium liquid again to add to their water, this seemed to help a bit before but I have 2 cockerels now and cant segregate who drinks what so don't want to be giving them too much calcium

I use layers pellets from Mole Valley farm feeds and have a tub of oyster shell always available in the run. Haven't seen Greedy in the egg boxes again yet