Horsemeat: two facts, a logical conclusion and a question

[badger]

i'm not a fussy eater and would probably try horse out of curiosity if I saw it on a menu somewhere?  I was at the Melton Mowbray market on tuesday and a couple of stalls had kangaroo, ostrich burgers etc and no one was jumping up and down and stoning the stall owners!  What I cant comprehend is how horse meat is cheaper than beef? are there horse farms where they are bred like cows for their meat?
badger [my name not a type of burger  ]