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I'm 13. Can I buy supplies at a pet store without a parent/adult present?
Perhaps a technicality, but minors do not have the legal capacity to bind a contract. Making a purchase from a store is a contract. I'm not a lawyer and there may be case law to the contrary or that creates exceptions, but my understanding is that purchases made by a minor may be void if later challenged. JohnFx's answer is true from a practical sense. But if you get turned away at a store, understand that they're probably just being careful to avoid headaches later.