Joey's breeder said that the trick with long hair is to create a "pee string" and keep this about 2 inches long coming from penis area. It doesn't need to be very thick, but the pee string acts as a wick to guide urine away from coat hair. Here's more info on pee string, see "grooming urination area."
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Neutering does calm some dogs down so that they don't have so much "nervous energy," which can use lots of calories, and urine will not smell as strong.