So my kids are all grown up and we decided to get a new pup. Problem is, my wife doesn't like leaving him at home in his crate too long, so our long rides on the tandem evaporated. I did a bunch of research on pet trailers and found a few fairly decent pet-specific options in the $130-$300 range. Even the low end price seemed like a lot, especially without knowing how the dog would like it. I read about folks who used kid carriers, but most of those have cloth floors and a "sling" seat - not too reassuring for the pup. Others ditched the original cloth floor and canopy and strapped a crate to the frame. Let's be honest - I'm already embarrassed enough about taking the dog on a ride - that's just too much me.
I did find an ideal trailer for Ollie. It's an old (discontinued) InStep Prowler, which by all accounts made a horrible kid carrier, but makes a pretty good dog carrier. It has a plastic tub for the base with a cloth canopy. The floor is solid and nearly flat. There's a steel shaft and 16" composite wheels that run on bearings (cheaply made, but work fine). You can even use one of the shoulder straps to tether the dog in the cockpit.
We took Ollie for his first ride yesterday. He barked like crazy for the first mile or so and then settled down and enjoyed the ride. We just tossed his doggie bed in to make him comfortable.
I bought the trailer for $20 in someone's front yard. A quick search of Craigslist (using crazedlist, crazedlist rules) showed many of these available across the country for a reasonable cost.
Just wanted to toss this in, as I didn't find a lot of good options in my recent searches.
The trailer does cost us a little bit of speed, but being able to go for long rides without my wife worrying about the dog - priceless.