What would cause a hens vent to continually drip? Back story: about 2 weeks ago I adopted 2 hens (3yrs old) who were in a space much too small with too many chickens. They have no feathers on their hind ends. The day I got them I began to put 1 teaspoon of sulfadimethoxine powder into their 1 gallon water can. I did this for 1 week every day and plan on doing it every other day for the next 2 weeks. Also been given them 1 tablespoon of plain yogurt mixed with about 2 tablespoons of sweet corn from my freezer every morning to help replace the flora in their gut. I've had them for 2 weeks and while there is improvement the one hen still drips from her vent. I felt sorry for these hens and after we were down to one hen I decided to adopt them...I'm beginning to regret it!