real horses, like this nimrod

[truepenny]

ME: [rummaging in tack room for ointment to put on a cut on Milo's right foreleg]
MILO: [from the cross-ties] I'm PEEEEEEEEEEing in the aisle, just PEEEEEEEEEEing in the--
ME: [emerging from the tack room like the wrath of god] STOP THAT YOU HORRIBLE HORSE!
MILO: What, me? I would never!
ME: Into your stall with you.
MILO: [plaintively] But I don't have to pee now.
ME: Tough.
[five minutes later]
MILO: I'm PEEEEEEEEing in my stall, just PEEEEEEEEEEing in my stall, what a glorious feeling . . .
ME: [facepalm]