If you do a search for mean roosters, you should find hundreds of message threads about it. You are not alone in having trouble with a roo or two.

Here is a link to "Keeping your Rooster Sane" From the Easy Chicken.

http://shilala.homestead.com/roosters.html

Also below is a link to Velvet Sparrows Chicken Site. She's got a lot of really good information on this site too.

Hope this helps.
Kitty

Here is a link that might be useful: Velvets home page

The sack thing sounds cruel to me. I don't see what it could possibly accomplish.

It is important that the rooster understands that you are the boss. I agree that you should look at Velvet Sparrow's chicken information, she has lots of useful ideas.

--Johanna

I have a rabbit hutch in the center of my chicken run, when I have a particularly nasty roo I sequester him to this cage for several days to a week. It has all the comforts of the coop with none of the physical contact with the other birds; this punishment works charms for a feisty roo. The sure cure is the stock pot though.

I would separate the roosters if possible, or perhaps add more hens to distract the boys.

Fighting is a territorial thing, so perhaps some more space might help?

It's practically impossible to stop roosters fighting, it's pretty much all they do apart from crowing, looking after the hens and eating. The only case I have seen where my roosters do not fight is when they grew up together (mine are also silkies).

I had a rooster that would regularly attack me. I would catch him in a fish net and just leave him there in the net for 10 minutes or so. All it did was embarrass him in front of his girls and make him meaner.

We have had other mean ones and now have three that are just fine. I think they are either mean or they aren't and you really can't do anything about the mean ones except make soup.