Runny (ish) poo, a little hunched, low appetite, negative for worms. - please help . . .

Hey all, I'm BRAND new here - first post ever, so I'm going to post according to the instructions I found from BYC!

1) Easter Egger chicken - two years old. Mildly thinner than the others.
2) She's slower than the others, this is new. A little hunched and fluffy feathered with wings sort of beginning to hang.
3) symptoms maybe 3-4 days.
4) No other birds act the same, *but we had one die last week. She came in (the back porch to treat) with similar symptoms and never recovered. Now that we lost one, my husband, the primary chicken care taker is paying closer attention to them and their behavior.
5) No sign of trauma
6)
7) She doesn't seem to eat her own food or even meal worms, but ate a hard boiled egg yesterday and creamed corn and a fruit smoothie today. So, low appetite.
8) Poop - kind of runny with "normal looking" green parts. - mild-moderate pasty butt.
9) no treatment other than poly vitamins and treat-type food. Oh, and a warm bath yesterday that helped, but the pasty butt is back today.
10 ) would like to treat ourselves if possible.
11)
12) She has 10 flock mates - all the same age, all brought home the same day two years ago. No changes in food, etc.

Note - we found a young opossum in the coop less than a week ago and my husband shooed it out. None of the chickens appear to have any injuries, but the opossum was definitely breaking and eating their eggs.

We sent a "flock fecal sample" to MidAmerica Lab after the last chicken passed - it came back negative on all except "no eggs only a few cocci". Mabe it was a false negative??

Although we've had the flock for two years, this is our first issue. All has gone well until now.

Any suggestions?

Thanks in advance.

Welcome to BYC. Has she been laying eggs recently? I would concentrate on getting her to drink fluids. Try adding a lot of water and a bit of plain yogurt to her feed to get more liquids into her. Feed bits of chopped egg. She may be suffering from an internal laying problem which is common in hens her age, and can lead to egg yolk peritonitis. It may take some ruling out other problems to narrow it down. Check her crop to make sure that it is emptying overnight. Check her for lice and mites under her vent and elsewhere. If you think you might be dealing with cocci, you could always give her a 5-7 day treatment of Corid in her water. If it turns out to be internal laying or EYP, there is not a lot that can be done. Hormone implants can be given to stop laying, but antibiotics are not that successful in treating it. Since you recently lost another, if she should die, I would save her body (refrigerate in a plastic bag,) and send it in for a necropsy. Most states have a state vet or poultry lab that performs those. If you consult a vet again, I would repeat the stool sample, but also ask for a gram stain of her droppings to look for bacteria or yeast.

Thank you so much for your reply.

Since we have three of this breed and only collect 1-2 eggs from them per day, we aren't sure if she's been laying up to now. She has not laid any eggs since we brought her in a few days ago.
She will eat corn and some cooked eggs, she no longer wants the hard boiled eggs.
She drinks water (she seems to drink a lot of water), but not interested in her feed.

Her poo has changed to a LOT of milky white watery diarrhea!

I'm still waiting on my husband to get samples from her and the flock - it's really his department!
Meantime I'll start the Corid today just in case I guess.

Hi, welcome to BYC!

Sorry for your loss.

Here is a link that might help if you decide to get a necropsy, which I highly recommend if you have any more loss. It's the only way to know for sure what you are dealing with.

https://www.backyardchickens.com/t/799747/how-to-send-a-bird-for-a-necropsy-pictures