I can make this dog backpack just a friend! I bought it for my little Chihuahua puppy. Unlike the previous review I had no problems with the zippers. Armed with their favorite blanket, asleep my little mouse once I start with the backpack on the way. But I do not think that the weight of the dog should not exceed more than 5-7 kg because of the backpack otherwise surely would be too small. The dog should finally also can snuggle comfortably and not feel like in a brawn. For small dogs but this backpack is quite recommendable. Value for money is good.