Here's what I found:
http://articles.latimes.com/1987-04-21/sports/sp-133_1_stable-condition wrote:The cyclist was hunting with his brother-in-law, Patrick Blades, and uncle, Rodney Barber, the son of the ranch owner. Blades fired a shotgun at a turkey and hit LeMond, who collapsed.
"All I know is Greg and his brother-in-law and his uncle were hunting on some property we own in Lincoln and Pat shot what he thought was a turkey through some bush," LeMond's father said. "Greg had walked around in front of it and just took some buckshot in the back."
Here is Lemond's own recounting of the shooting accident, and his initial recovery and return to racing. I suppose some allowance for artistic license in some of his responses might be in order though. This is a somewhat entertaining clip.
At 0:58 of Greg LeMond talks about his hunting accident (audio). Lemond wrote:He thought I was a turkey.