I have noticed somewhat that whilst many lions, tigers and leopards are often tamed and are available for performance in photography, commercials [and to a lesser extent, circus] etc there seems less snow leopards and jaguars in such things. And also in zoos I see many of these species [snow leopards included] but less jaguars. And also the jaguar exhibits I see in zoos are often [though not necessarily always] architecturally distinct from those of other big cats. I wasn't entirely sure why this was? Have I not seen enough jaguar enclosures? Since they were in considerable numbers in the US until later times, were there laws restricting their holding in US captivity? Are their bio-mechanics largely different from other big cats?