Separate Dogs from Cats A gate with a small pet door that allows cats to pass through while restricting dogs. Slide Up and Down to Adjust The newly designed cat door can slide up and down to adjust the height and lock. The cat door can be easily adjusted. Previous page Next page What if I accidentally misoperation cut the zip ties before installation? Don't panic. You can use zip ties to re-tighten the two posts near the door lock opening and install the baby gate. Is it normal for there to be a gap between the door lock and frame before installation? Yes. Gaps between door lock and frame are normal and will be resolved after installation. How wide should the gap in a door lock be kept after installation? After you have completed the installation, please check whether the gap in your door lock is within 2 mm. If not, please tighten the bolt adjustment.