An ordinance passed Tuesday in Ypsilanti Township, Mich., requires area pit bull owners to have their pets spayed or neutered, in a bid to address dogfighting and related problems. The new law, which imposes a maximum $500 fine or up to 90 days' jail term on violators, has some residents concerned about how to distinguish the breed from similar-looking dogs. Others argued that breed-specific laws are opposed by the AVMA and other animal groups.

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