From Both Ends

Horse & Rider - - Whole Horse Q&a - MELISSA ESSER, DVM, MS, DACVIM As­sis­tant Pro­fes­sor Michi­gan State Uni­ver­sity

When a horse coughs, no mat­ter what the cause (heaves, pneu­mo­nia, as­pi­ra­tion of for­eign ma­te­rial), a strong ab­dom­i­nal press is re­quired to force air ag­gres­sively from the lungs and out the nose and mouth. This pow­er­ful ab­dom­i­nal com­pres­sion, while pro­duc­ing a suc­cess­ful cough, will also some­times harm­lessly pro­pel gas present in the rec­tum out as forced flat­u­lence.

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