Update & a little further information on my ex battery hen that I've had for 3wks now:
6 days ago
There was one less egg than usual
5 days ago
Noticed a partial soft egg: no yolk to be seen & about 1/4 soft shell
4 days ago
Noticed hen shaking her head, not eating, tail down, fluffed up & poop all down her backside & generally standing around.
Checked for mites/lice & no evidence of any. She felt skinny & legs were cold compared to the others.
She went into a confined area under the nest boxes & layed down. This is the last time I have seen her lay down
3 days ago
Symptoms had not changed since the day before.
Seen her Poop & was clear on the ground, but yellow ran down her back side
Gave her Apple Cider Vinegar (ACV), honey, water mix orally via a needless syringe late morning
Slightly improved by the afternoon, still shaking head, fluffed up & tail down but pecking at the ground every now & then & legs feel warm
Noticed she would peck around the feeder, but not in it. I placed pellets on the ground around feeder & she ate it.
Brought her in the house with a hot water bottle
Bathed her
Fed normal pellets, oyster shell, tuna & ACV/water/honey in separate bowls. She was eating & drinking
2 days ago
Head shake has stopped, she is eating well, poops are firm, still fluffed up & tail down
Bathed & blow dried her
Lubricated up her vent
She was pulsing her vent area when put to bed
Still inside with hot water bottle & same feed as day before & she is eating & notice she pecks at the oyster shell the most
1 day ago
Notice head shake in the morning but had gone by the afternoon. Still fluffed up & tail down
She is eating & drinking & still particularly pecking at the oyster shell a lot
Bathed & blow dried her
Gave her approx. 150mg of crushed calcium tablet mixed in 1/4 cup of water & administered approx 80% of it orally via a needless syringe
Still inside with hot water bottle & same feed as day before & she is eating & notice she still pecks at the oyster shell the most
Today
No head shake, she is eating & drinking well, still fluffed up & tail down.
Pecking at her food or the hay which is her bedding on a more constant level
Still inside with a hot water bottler
I haven't tried to feel for an egg internally, because I haven't done it before & don't want to inflict further damage to her by doing it wrong. Not sure if she is good enough to put with the rest of the flock, because although she is eating & drinking well, her head shaking has stopped, I'm not sure if she has retained an egg or why her tail is still down. I have tried to feel externally, but I just don't have the experience to tell. She still is fluffed up, not laying, tail down & haven't seen her sit/lay down for 4 days
Any advice from this point forward would be welcomed for this inexperience hen carer.