BORDER SONGS by Jim Lynch.
Set along the washington/BC border and focusing mainley on a "extermly disslecics"  but very large border patrol agent and his family,co workers, and nieghbors. Although extermly good with animals his diary farm running farmer gets his son to go into the boder patrol using a favor from the local commander of the boder patrol. Medicorer and using a partner to get by Brandon Vanderkool suddenly becomes the best agent in northwest washington finding and arresting drug runners and illegale migrants from canada. Hes then faced with a friend from childhood whos working on the other side of the law. With his mother slipping into demencia and his father going god knows what brandon leaves after thing settle down, even after he catches more drug runners on his farm.