Susikoira Roi (1987)

The story of Tomi, a schoolboy who finds a dog tied up in the forest and stoned by boys. Tom and the dog become friends immediately, but not all the residents of the town agree with Tom about the value of the stray dog, and the boy is forced to go into hiding with his new furry friend. Tom also has to work hard to convince his family at home to let him keep the dog.