Scooby: Outfitters' Inspiration?

Somewhere way back there, we think Scooby's a descendant of Buck from Call of the Wild. He prowls around town looking left and right and over his shoulder, often carrying a three foot-long 2 x 4 in his jaws (resistance training, we assume). On some lonesome, gray, windy evenings, he ambles down to the shore and half-yelps, half-howls over the bay. We also think his fur may have been the inspiration for Patagonia's Classic Retro-X Jacket.