Well, if that's the same Guest that has recently been so argumentative he or she just got the disease terminology a little mixed up. He or she in fact does have Foot IN Mouth disease --- might have caught it from Oregonian (greenpasture??).
"An acute highly communicable diesease chiefly confined to cloven-footed animals. Cattle, swine, sheep, goats, buffalo, bison, camels deer (it goes on to list about another dozen cloven-hoof animals), antelope and hedgehog are generally considered the natural domestic and wild hosts. The dog, cat, rabbit, mouse, muskrat, rat, chicken and other fowl, turtle, snail, monkey, and snake can be infected artificially but are not believed to have important roles in the spread of the disease. Man, despite his frquent and sometimes intensive exposure becomes infected only rarely"