The biting of each other on the legs is normal and will end up soon. This is because it's a way of establishing relationship with each other. However, you need to make sure that your chickens have enough space so that they can be able to move freely without causing so much harm to one another. Check out http://www.wilderness-survival.net/backyard-chicken-behaviors/ for more details.
chickens attack whatever they see that's small, bright and moves. Mostly mites. They're bright red very small dots and chickens will strike at it. Chickens will also strike at blood so if they're attacking a chicken and it's bleeding best to move it out of there because if it's sick the other chickens will kill it. Best thing to do is clean up the hen house or chicken coop as much as possible. Mites like to live in those spaces. Put lots of straw or wood shavings in there too because the chickens scratch along that and the mites will fall off their legs. All in all if they're roosters they will attack each others legs because that's where their main defense is and they scratch each other up. But if it's just hens pecking at one another it's mostly just mites and best thing to do is clean out the coop and put the hens in a place till they heal.
1 year ago
Last edited at 3:47AM on 3/27/2013
Have you heard the term "pecking order?" That comes from the fact that chickens peck each other to see who is the alpha chicken (I do not jest.) Some owners have to actually clip the tip of the beak of aggressive chickens that will actually peck the lower chickens to death. This will not end without your intervention. Removing the aggressive chicken from the coop may be the only way to stop it--that, or clip the beak. Check with an experienced farmer for suggestions, or go to the site http://answers.yahoo.com/question/index?qid=20121129112409AAlbl0r