first let me go ahead and answer your questions seven month old australorp she lives with eight other mixed chickens all the chickens look very healthy coop is always kept clean well feed well watered i get from seven to eight eggs every day the do not free range about two months ago i walked in the coop and she was in one of the egg boxes and she cried at me and i picked her up and one of her legs was all curled up against her body and she could not walk, wings drooping alittle bit. so we made up a box and put her in the house would not eat much by day number three she was begining to stand on her own. Took her to the vet that day we couldnot find anything wrong with her so he gave her a half cc of penicillin and gave me the stuff to give her a shot two days later she made a great comeback and about a week later i put her back in the pin she did not lay any eggs while we had her out of the coop we dont know if she has ever layed an egg since we have never had nine eggs in one day seemed fine until two weeks ago. walked in the coop and found blood under the roost and on the floor she had pasted up, and atleast one of the chickens had really tore her vent up brought her back in the house started her on .5ccs penicillin and some ointment on the vent vent looks fine now she eats pretty good. still has not layed an egg matter of fact she ate very well today, crumbles,a scrambled egg every couple of days, two cherry tomatoes every couple of days a little oatmeal today for the first time. now for the problem there is a non stop discharge of clear liquid coming out of the vent. enough that her backside stays wet to the point of if i put her in my lap i have to put a towel under her. if you watch her every five ot ten seconds you see a drop roll of of her i have spent hours on the computer trying to figure this out i have no idea whats wrong with her somebody please help as chickens at my house are like kids. will answer any other questions. thank you in advance for trying to help her.