Somehow officials were able to contain the virus with only Billy and Rex being infected.
Billy's childish mind was unable to deal with the thrust into an adult pig man's body and almost immediately found the joys of masturbation. His parents tried for a month to get help curb the problem, but with the puddles and smells, they finally couldn't take it anymore and sent him off to a farm lab for care and study.
Rex on the other hand acted like a normal kid from day one. He was also a quick learner and was starting freshman year in high school at the ripe age of 11 instead of the usual 14. No one really suspected a thing though do to the thick blond body hair he had had since the change. Even though he did still have some doggish features (the tail had been surgically removed) everyone treated him as a normal kid. Hell, most guys envied him, since he had allot more hair than their barely maturing bodies.
It was only a few weeks after his 12th birthday that new feeling started to flow through his body and he started checking out guys.
Puberty was starting for a second time in his body, and no one had any idea of what the effects of the virus and the changes of puberty would push on his body.