Jerry bred his Chem Dog cut to a Humboldt county indica boy. This was the beginning of his cubing proccess. At BX3 he got a pheno that had all the smell, taste and kick of the Chem Dog, but in a pure indica pheno. Jerry gave this plant to Bob. It became known as the West Coast Dog. Bob bred this plant to my Old World Kush male. He took a male from that cross and bred it to the OG cut Putz had sent him. This is what made the original Bubba.
Probalby this description isn't correct according to this video https://www.youtube.com/watch?v=2bJB63OBDb8 (3h:40min) and this thread: https://forum.grasscity.com/threads/birth-of-bubba-kush.1262779/