Father, Son, and Giraffe

I have absolutely no context for this photo, other than it appeared in an "Old Photos" facebook group.  The caption simply says, "A father helping his son feed a giraffe at London Zoo," with no information on the date, the photographer, or the identity of the family in question... or what they're feeding, which is what I'm most curious about.   

A little digging around online and I turned up some more info.  The man in question is a circus strongman, Paul Remos, with his boys in 1950, but I'm not able to confirm this - though the profession would certainly explain his ability to hold the child like that.  To be fair, with balance like that, the kid looks like he's got a future in the circus as well.  Now, what the picture doesn't tell us is whether or not the little one got a turn as well.