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Police are seeking the public's assistance to locate Mark McDonald, who they say is with his dog Penny. (Photo: OPP) (Oct. 31, 2019)

Wellington County OPP are requesting assistance to locate a missing man from Guelph-Eramosa Township.

Mark McDonald was last seen in Burlington on Friday.

The 75-year-old is described as Caucasian, 5’9, average building, medium length grey/white hair, full white beard, blue eyes, and wearing glasses, blue jeans, and black boots.

He is expected to be operating a 2011 green Dodge pick-up truck with a cap cover and is accompanied by his German shepherd dog named Penny.

OPP and his family say they are concerned for his well-being.