In the Southeast, where humid conditions are the norm, there is no
number set for respiration at vet checks. Inversion is not
considered to be a problem; in fact, it is often the most fit horses
that are inverted (because their heart rates drop so low, while they
pant to help cool themselves). I believe a good endurance horse will
often learn to pant.
If a horse's respiration is high, the vets may take his temperature.
If it's not too high (such as, below 103 degrees) the horse may
continue; if it is high, they'll ask you to cool the horse and bring
him back for a recheck. I often took Kalhli's temperature myself,
and as long as it was below 103 I wasn't worried, but I wouldn't
leave a vet check with a temp over 103.
One of the famous SE horses of the 1980's was such a panter that he
sometimes left vet checks onto the trail with a respiration rate over
100. He is retired and healthy today with over 8,000 miles.
--Joe Long Rainbow Connection Arabians PC/LAN Manager home of Kahlil Khai Calhoun Community College AERC Hall of Fame horse jlong@hiwaay.net 11,475 miles completed