Good Morning!
We purchased one of the "burleys" that pull behind a bike AND will convert to a "stroller". It is actually for kids, but works perfectly for us (especially at campgrounds when we bicycle and hike). Shelby & Seymour absolutely LOVE it. They can't wait to get in it.... and they can go for LONG rides and walks without wearing out their little legs. We purchased the Schwinn brand (under $100 at Target) because the tires were larger and also were "air tires" not the hard rubber ones...... better ride for the furkids.... bumps not near as rough! It has a top with velcro and snaps on it that secures them in (at least ours can't get out of it...... but if you have a "houdini"
, you may want to use a coupler strap that attaches to their collar to keep them more secure). There is also a swivel on the hitch for biking, so that if the bicycle turns over, the cart won't... a great safety! It really pushes easily when using it as a stroller, too.... but keep in mind, it is not a small item that you can easily take in and out of the car (when going to the mall, etc) like some of the dog strollers. It is quite a bit bigger.
Sorry bout the novel....... but wanted to pass along the info..... hope it can help someone!
......... a gal we ran into at a campground loved this idea so much, she is planning on getting one to take to dogs shows. She has a larger dog ( I think a retriever) and said it would be great to keep her dog clean and much easier to push then a wheeled crate to and from the show site.