I am no dog, but when I was little I practically lived in trees with my sisters and cousins. We even named our three favorites, Savey, Pitchy, and Stump. Pitchy's name says it all. We'd go home at night covered in pine pitch, head to toe. It was quite painful having Mom try to comb my hair, so we came up with a way to get it out. A good shampooing with lots of soap usually got it out of my hair, after saturating it with vegetable oil. Not sure if it will work on dogs, but it worked for me