Abby was once an outside cat who was really having a hard time learning to use a litter box. I decided to put her in a large dog crate with a litter box and some food/water and blankets to see if she could get used to using it. After about 10 minutes in the crate she appeared back in the living room. The crate was still closed and intact. I put her back in the crate and in another 10 minutes she was out again! The crate was still closed and I had no idea how she was getting out so I put my camera down there to see exactly how she did it. I was amazed to find that she was squeezing through a 2x5 inch hole! Thanks to her escape tactics she is still roaming the house and the litter training battle continues! .