How to buy a dog wif hat?

Could you please clarify the question you're asking? It seems there might be a typo or a misunderstanding in the phrase "buy a dog wif hat". I'm not quite sure what "wif hat" refers to. Are you asking about how to purchase a dog with a specific hat? Or is it a reference to a particular breed or type of dog? If you could provide more clarity or correct the phrase, I'd be happy to help you with the description.