SindriAndBale said: No, its because when the artists draw fox ears/tails or wolf ears/tails they almost always look the same.
Wolves typically don't have white tips on the ends of their ears and tails, foxes do. So does Horo, which is why many people thought she was a fox. The fact that she has the same yellow/tan and white fur color on her ears and tail as the typical foxgirl when most wolves are depicted as having white or blue fur didn't help either.