This pet gate is very sturdy, won't fall over, and is well-made! The con to that is that it doesn't easily fold flat to be stored away. You actually have to unscrew parts to fold it flat, so you have to be creative in where you store it when not in use. Also, although it is made for small dogs under a certain weight, my Italian Greyhound, who is very small but has long legs. could easily jump right over it. For this reason, I had to return it. I think it would work well with a chihuahua or even a teacup breed, because the vertical posts are spaced pretty close together. If you have one of these kinds of dog, it is a great buy!