If you are having staffing issues https://ca.indeed.com/?r=us is a good tool for posting job openings. Facebook employment section is also a great way to find younger people looking for jobs. As well John mentioned a program through YMCA that can help with your employment needs. The info for his area is below, you might want to call your local area and see if they have a similar employment program.
YMCA of Owen Sound Grey Bruce, Employment Services
945 3rd Avenue East, Owen Sound, ON N4K 2K8
T: 519-371-9222 x 229 | M: 519-373-6121