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Veterinarians are voicing concern amid a recent rise in "canine flu." Although specific case numbers aren't available, state experts ranging from vets to shelter officials and animal-rights activists are urging vigilance. The canine flu reportedly can be transmitted by touching an animal or touching food dishes, water bowls and toys. A canine-flu vaccine reportedly is available, and some veterinarians are requiring clients to vaccinate their animals by April to slow the spread of the virus.