Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No rear vent on small Petmate Vari Kennel

I purchased two of the small kennel for an upcoming transatlantic flight with my cats, and chose this model specifically because the product description claims that the kennel meets the IATA requirements and has rear ventilation. However, there is no rear ventilation on the small model and therefore it does not meet the IATA requirements, there has to be ventilation on all four sides. It's too much of a hassle to return such a large item, especially considering that the kennels were delivered in a broken box that I would not be able to use for a return, so I suppose I'll have to borrow a drill to make ventilation holes in the back of it in order to be able to use it for the intended purpose. The product description should be corrected.