Oyster shells

[Yummy face]

One of my chickens are laying thin shelled eggs and soft shelled eggs, all of my other chickens are laying fine eggs. It might be a calcium deficiency so I got some oyster shells from my fishmonger. Im going to dry them and crush them and feed them to my chickens. Can chickens eat all parts of the shell? Or just certain bits lime the insides. There are limpets or whatever they are called clinging on the shells, is it still OK for them to eat?

 

[Yummy face]

 

[Perris]

you might want to give them a thorough rinse to get rid of any salt, and then bake for a while to kill off anything that may be living in them. Then crush.
How old are your girls? They will all need oyster shell (and Vit D) sooner or later, unless you are giving them layers feed.

 

[Yummy face]

They are 4 to 5 years old, they are given layer feed. The hen that lays the weak eggs also has bloody poop sometimes. Today I found something in her poop that resembles a worm.

 

[Perris]

OK, so she should be getting all the calcium she needs from the feed.
Can you take some photos of the poop, with worm ideally, and bloody poop.
A parasitic infestation will often impact on egg laying.