Quote Originally Posted by Lady's Human
Instead of a chain, use a wire rope tie out. They are readily available, and hold many times more force than a dog can put out.

http://www.homedepot.com/prel80/HDUS...p?pn=100349311


just a sample of a wire rope run.
Unfortunately the wire ropes aren't foolproof. Star has broken 2 of them and Sherman quickly chews them till they frazzle. My experience is that only 6' kennel fencing will keep outdoor dogs safe (provided they don't climb or dig out, or can jump over that height). With as many outdoor dogs as you say you have, I'm really surprised you don't have a fenced kennel. How do the rest of the dogs stay in the yard? Are they all tied?