nutritional disorder, excess and deficiency?

[chirpy-chick]

Hello,

I didn't quite know where to put this post but i guess this would be the right place as its about nutrition. I am doing an assignment about chickens for college and i need to write about a nutritional disorder, an excess and a deficiency but i don't know of any.. i was hoping the people on here would be able to help.

thanks in advance.

 

[Lazy J Farms Feed & Hay]

Vitamin D deficiency leading to Rickets.

 

[Eggcessive]

There is a condition called wry neck/crook neck that is believed to be caused by vitamin e and selenium deficiency. There are many posts on here and info on the web about it.