Savic Dog Barrier 2 with Cat Door

My dog can fit though the cat door. The cat door needs to be made smaller

This is good if you need the small door, to give cats and small dogs access. However, if you don't need this there is an identical child gate available for less than half the cost of this.

It's nice and tall, so my dog can't jump over it. However, the cat flap is way too big. My 22kg dog can easily get through it. As a temporary fix, I've tied some string to make the opening narrower, so it's only about two-thirds the size. Now my dog can't get through, and my 8kg cat can still easily pass. I need to come up with a more permanent solution, since I think the dog could easily chew through the string. But unfortunately, it won't be possible to close the flap anymore.