Greetings
GingerChloe,
The very best thing for your girl, would be to take her to an avian or exotic animal veterinarian. They would be able to do a better job of diagnosing and medical treatment.
But, if you cannot take the hen to a vet, for what ever reason, here are my thoughts.
White liquid poop is urine (clear, sticky, or mucousy) and urates (chalky white). This can be the result of infection, and/or, a tumor, parasites, egg binding (NA, your girl is currently laying). The chicken's liver and/or kidneys are stressed. Administer
Liquid Hepato for Pets, this has vitamins and milk thistle to support the organs. Can be purchased online or at a pet shop/farm/feed store.
If your hen has been sick for a month, she may be close to death already. But, I say do all you can, till she either passes away, or recovers.
- First, make sure she is hydrated.
- You may need to manually feed her bird meal replacement (I prefer hemp protein powder), with a syringe. First try offering: wet mash, cooked egg, diced cooked meats, cooked brown rice, diced fruit, cooked diced vegies, chopped greens. All in small amounts.
- If she improved with the antibiotic, but not fully, amoxicillin may not be the right choice. Enrofloxacin (Baytril), is a broad spectrum, and is safest and effective.
- If your chicken is still laying eggs, and not eating she will deplete her calcium, and this can affect her bones. Administer one half Tums tablet (break into small pieces), once a day for three days a week, till eating on own, again.
- Keep the vent area, clean to prevent vent gleet.
- A fecal float test should have been done to rule out parasites. If you live near water ways, lakes or bogs, oviduct fluke is a possibility. Any vet or private testing lab can do the test at a nominal fee.
Because the hen is older, there is the possibility of a tumor. I have a hen, that was laying eggs for a while, even though there was a tumor internally. She is still living with the flock, requires periodic care, as, she goes in and out of remission. You should also check the hens belly between her legs for any swelling. Ascites buildup will cause swelling and white watery poop, due to reproductive problems.
These are my thoughts on your hen's issue. I hope they are helpful.
Other members will offer advice, please consider too.
God Bless