February is Responsible Pet Owner's Month, and one of the most responsible things a prospective pet owner can do is prepare for the upfront and ongoing costs of having a faithful friend. Of course, there's the cost of purchasing and feeding the pet, but sometimes other expenses aren't so obvious. Some animals are prone to costly health issues, while others have special grooming requirements, require pricey habitats, or boost home insurance premiums. These 15 common pets -- dogs, cats, and a few exotic choices -- might ultimately cost a tad more than expected.
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