Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not satusfaied with product.

I have Rhodesian ridegbacks. I have purchased this item twice. Every time they have bent the door opening so then it sags on top. The supports are not strong at all. I could see if my dog was a huge dog but they are not that big yet just a nudge with the nose they bend it all up. I like the convenience of being simple to put up. I show my dogs so it makes it nice for shows. However now having a sagging top they don't want to get in it. They need to find a way to make it sturdier.