This happened a number of years ago, but it really turned me off to Hartz products. Hartz produced a gerbil cage, advertized as safe for this species in which my gerbil chewed through in no time at all. Now that I have far more experience with this species, it is obvious that any gerbil(s) could chew through this product and become lost in less than 24 hours of being put into the cage. After calling the hotline, I was instructed to mail the cage back (at my expense) for a refund/replacement. I did so and never heard from them again. While this is not as serious as the issue with their flea control products, I still feel that the marketing of this product as safe for gerbils is indicative of their shoddy work and lack of concern for animals.