The Medicine Hat Police Service is warning pet owners of an aggressive Moose in the area of Cannaught Drive SW.   The cow Moose is wintering in the coulee's in the area and has acted aggresively towards a dog being walked in the area.   Police are asking dog owners to keep their dogs on a leash when in this area and to make noise especially if walking at night.   A Moose will defend itself against dogs and other animals often resulting in very serious injuries to the pet.   Thank you.