Alberta dogs sniff out invasive weed in provincial park

[news]

http://i.cbc.ca/1.2729720.1474588498!/fileImage/httpImage/image.jpg_gen/derivatives/16x9_460/alta-mussel-dogs.jpg Dogs trained to sniff out invasive zebra mussels on boats have been given a new mission: search a provincial park for an invasive weed that is hard to spot.


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