There are specific strollers for pets. Here are a few sites:
http://justpetstrollers.com/pet_stro...25_pounds.html http://www.drsfostersmith.com/Produc...All&Nty=1&pc=1
and:
http://www.petedge.com/shopping/brow...yword=stroller
I got the Happy Trails stroller from petedge. I love it. There are some critiques of some strollers on this site. you need to go to "Search" and plug in words like: Stroller or pet stroller or happy trails stoller.