There aren’t many pet strollers out there that specifically are designed for two pets to ride separately, aside from the KittyWalk Double Decker. The Double Decker has two separate, removable carriers, each with a front and a back door. The doors are closed with durable metal clasps, not with zippers. This type of stroller is perfect for keeping two pets separated when they won’t play nice together.
However, there are many pet strollers that have the capability to carry more than one pet at a time. First, pay attention to the cabin dimensions to determine whether your two or three pets will fit inside. Then make sure you adhere to the weight limit that each stroller can carry. If you have concerns about whether your pets may jump out of the stroller, then you should also pay attention to the number of tether clips available in the cabin. Some people don’t even use this feature, but if you think your pet might make a run for it, you may want to look into the number of tether clips. The PetZip Monogram and the PetZip Happy Trailer both have more than one tether clip.
The above mentioned strollers and many others are available at: http://www.PerfectPetStroller.com