I also think a doggie stroller would be so much easier than a bag for two.
My sis got me one on ebay recently for my birthday and it was 39.99 including shipping and is such a pretty pink.
It so looks like a baby stroller and would fit two dogs since it has teathers in there to hold two dogs from jumping out if you wanted to leave the mesh part open.
If you toss a blanket over it no one would know you had dogs in it unless they barked..lol |