Hen with watery stool and today passing bloody stool. How do I treat her?

[nermit70]

I have 4 backyard year old laying hens which lay regularly and all appear to be healthy. One hen has had very watery stools for several months, and small blood spots on some of her eggs.but otherwise seems okay.
Today for the first time she had a bloody stool. How should I treat this? I plan to separate her from the others for now until I find out what the problem may be. They do not run free in my backyard but have a very generous enclosure which I clean frequently. I am in the San Francisco area so live in a very mild climate.

 

[Eggcessive]

Welcome to BYC. Blood in stools can be a sign of coccidiosis, but enteritis and capillaria worm may also cause this. If it were me I would treat for cocci first with Corid (amprollium) for 5-7 days. Dosage is 2 tsp of the liquid or 1.5 tsp of the powder, and i would treat all chickens. Then give a few days worth of vitamins and probiotics in their water. If you want to treat for capillaria worms, give fenbendazole (SafeGaurd Liquid Goat Wormer) 1 ml orally for 5 straight days to each hen. Here is a link on cocci and enteritis:
http://www.the-chicken-chick.com/2012/12/coccidiosis-what-backyard-chicken.html
http://www.thepoultrysite.com/diseaseinfo/101/necrotic-enteritis