Some cockerel's are just aggressive, it has nothing to do with their size.
My most aggressive one was a bantam Old English. A beautiful, but highly protective and combative rooster.
My neighbor wouldn't go near him and was shocked to see me holding and petting him. I would turn him over and he...
Were the ones that hatched in the middle of your incubator? If so, could have something to do with the temperature setting.
Was someone opening the incubator a lot to check in them? If you do this too much, the humidity levels drop and can this can also cause that problem. Humidity and...
I like the idea of the pellets, but my chickens don't like them, so I went back to crumbles.
To save on waste from the really fine crumbles, I sometimes mix the fine crumble with a little water and peas. Then there is no waste, but it causes me more work because I then have to completely clean...
One more thing: You said they are older non-laying birds, about 4 years old.
I have some 6 year old hens that still lay, but not everyday anymore, more like every 2 or 3 days. Often when hens stop laying, it is a sign of an illness.
Have you introduced any new birds to your flock? If so, even...
I thought worms too. Sometimes you can see the worms in the feces. Also mites can suck too much blood and get the chickens weak. I am not an expert, but I have only had this problem once.
I had to be out of town for a month and I am not sure that my chickens were properly cared for, eg fresh...
Though my daughter wouldn't go near this breed (we had 5 beautiful roosters), I really liked them.
One was more docile, but the others were more flighty and aggressive. The most aggressive one was my favorite.
He would attack my shoes or hands, but once I picked him up and he knew I was not a...
Kelsie2290 - great advice.
The chickens have to have "their own place" and habitual. If you do not have them in a stall in your barn that they can originally feel safe and comfortable, they are probably just trying to find a place of security.
They will certainly hide their eggs. Chickens...
I wouldn't just go by the size or the aggressiveness. The only way to really tell is when they are about 3-5 months and you can tell because the males get the pinfeathers (longer pointed feathers that drape a little by the tail) or when you get one crowing or laying an egg!
I thought I was...