Loose-yolked eggs & sick-acting hen

[Mia]

Hi everybody -
Since a few weeks ago, we've been getting weird eggs occasionally - they have very loose, sometimes bloody yolks. Does anyone out there know what it means? We feed Layena pellets, vitamin-enriched water, oyster shell grit; also treats such as oatmeal daily, cereals, breads, veggies, fruits, etc (this varies every day).
Also, don't know if this is related, but we lost a hen about a month ago - appeared healthy one day, and then found dead in her pen the next, no visible wounds, nothing odd except an extremely light light comb and wattles. And right now we have another hen, about 14 mths old, one of our favorites, a RI-red cross, just sitting quietly; not eating much at all. Her vent appears clean but the feathers around look like she may have had whitish diarrhea. Comb looks normal. We have isolated her.
If anyone out there can help, we'd appreciate it! Thanks so much -

ps we have 13 hens, 1 rooster, so we're not sure who the odd eggs are coming from -

 

[Jenski]

Mia, how old are your chickens?

How long have you kept them on the property? Are they the first set of chickens there?

What is your weather like?

 

[Mia]

All our chickens are the same age - about 14 mths, we got them at 2 days old, we've never had chickens before, and they're in a coop we built last year.

We are up in New England - the weather here has been very wet, raining almost every day, somewhat humid, but yesterday was partly sunny, breezy. Nights have been cool - 60's.
thanks -

 

[Mia]

I'm hoping someone out there can help - our sick hen's poo is very very GREEN, semi-formed, with a lot of water in it - and she is not eating. We have her quarantined with food and water but do not know what else to do. Ideas, please??

Thank you!