Commuting - How can you get yur dawg to stay on the bike?

I have four dawgs, all ill mannered mutts. Not vicious, just ill mannered. I think it would be neat if I could buy one of those bike trailers, and take them out one at a time on a ride. But I'm afraid as soon as they see a squirrel or another dog, they'll jump out and go after him. Do any of you take your dawg out for a ride -- on your rack or in a trailer? Do you tie him to the bike? If so, would he strangle himself if he jumped? How does it go for you?

My 110 lb Newfoundland (see avatar) would be a bit much to haul. Because of our relative sizes, I am reluctant to try one of the bicycle "springer" jogging systems for dogs. If Alice took off, I think no spring would keep me and bike from being dragged away. However, my son and his GF just got a Silky Terrier. I could see taking 10 lb Harry for a ride in a messenger bag.

When my x and I broke up i used a bike trailer to haul my son around we had a 13 inch beagle at the time and she rode with us just fine. (had to part with her last year because of kids) but she was a well behaved older dog too

Check out Cycle-Tote Trailers http://www.cycletote.com/ They offer a DOG trailer. I have been using a Cycle Tote trailer for 5 years, great trailer! If your dogs are large you can get the trailer with brakes. My trailer has brakes and they work very well.

I use a leash to keep miss Ellie in the Burley trailer she rides in. I loop it around the built in seat belts a few times. She can sit or lay down, but can not get out. Ellie has topped out at 42 pounds and other than the weight, I hardly notice her.

if your dog doesn't want to stay put perhaps you should examine the possibility that it's not happy in there. i assume you're taking the dog for a ride for its pleasure, rather than your own ...

Ellie jumps in the trailer whenever I hitch it to my bike...so I know she likes it. I strap her in for her own safety. And on that note, I just got her a nice car seatbelt, which I am going to start using in the trailer.