thank you for the info! I'm going to look into getting one for coco. How old is MIA? Has she reached full size? I'm worried about coco outgrowing the sac Baxter. TIA!the one pictured is called the Sac Baxter PM (the smaller size.) Mia also has a Sac Chien but the Sac Chien is completely enclosed..it looks like a crate and is used for airplane travel, etc..Sac Baxter can be used daily, like a purse. Whenever I grab my keys, Mia jumps into the Sac Baxter..she knows it is time to roll! LOL...HTH!