1/3 eggs a day!?

[EmilysChickens]

I have a light sussex hen who lays one egg every day. However, I also have a silkie who used to lay quite a lot(nearly every day) and now doesn't lay any!(due to being broody). And I have a BIG buff orpington hen who (when we got her) didn't lay anything for months and months and then one day(about 6 weeks ago) started giving us eggs every day! The farmer said she was a very old chicken, so may not lay, so we were very surprised! And the eggs she laid had blood on them every time! At the moment she is not laying anymore, she is broody, but will she ever lay again?! Help me?! Am I losing one of my girls?!