Your intrepid Factoid-Buster is now hot on the trail (or perhaps that should be tail) of the Lamb Chop Factoid. Here is another thread from the Ed Forum, this time in 2010 and once again started by Jack White (EEK!):
https://educationforum.ipbhost.com/topic/15477-why-was-this-man-carrying-a-toy-dog/.
It seems pretty clear there was no Lamb Chop in the limousine, unless Jackie used to call Greer "Lamb Chop" in their more informal moments. Probably I'll just let this factoid die a peaceful death.
Just a thought, Royell: Maybe that's why Officer Haygood had his glove off - to accomodate Lamb Chop if necessary for a clean getaway? "Do
not leave the scene without Lamb Chop, Officer Haygood Imposter."
Oh, wait, here is a 10-second YouTube video clearly showing Jackie holding Lamb Chop at Love Field. Except I don't see any Lamb Chop unless this was her pet name (pet name - get it?) for JFK, as in "Why are you porking that 17-year-old intern, Lamb Chop?"