My shelter is any age but if you are under 18 then you need a parent. I was so frustrated because I am 16 (almost 17 ) and the only day my mom and I could go volunteer was on Saturdays, and most Saturdays I have something planned with my Scout group. The shelter directly told me that they would love it if I came in more and gave me permission to come in without a parent. Now I'm there as much as I possibly can But yeah, check it out with your local shelter!