That's apropos of nothing, except that we received a question about wheels on the pet stroller.
Before you select a stroller, think about the types of surfaces on which you'll walk your cat or dog. If you roll over smoother sidewalks and street (and if your pet is smaller) then the smaller wheels on the original Kittywalk Pet Stroller or the Walk 'n Roll Pet Stroller might work well.
On the other hand, if you think you'll head over rougher surfaces (grass, snow, gravel, etc.), then one of the Kittywalk SUV models or the Happy Trails Pet Stroller might be preferable--both have 8-inch wheels, and the Happy Trails features a simple shock absorber system to even out the ride for your pet.
Hope that helps, and if you have any comments or questions, feel free to post!