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RE: [RC] RHR in youngsters - heidi

Any experts or veterinarians out there who can tell me at what age a horse's 
resting heart rate becomes more or less established?  I am looking at 
purchasing a youngster and I don't know whether in horses, as in humans, the 
heart rate is higher at an earlier age than it will be later on.  Thank you 
very much in advance for replying.  Martha in NM.


I wouldn't look for the RHR to be "mature" until the body size is mature--say, 
age 4 or 5.  (Note:  skeletal maturity is later--this is related to body size.)

I also don't put as much stock in RHR as I do in the absolute recovery rates of 
the youngster's close relatives--I want the RHR to be under 40, but I've had 
numerous close relatives with RHRs in the mid-30s that outrecovered horses with 
lower RHRs, and I've found the absolute recovery to really run in families.  So 
in other words, I wouldn't assume that a horse with a RHR of 30 is going to 
outrecover a horse with a RHR of, say, 38.  I'd look to the relatives to make 
that choice in a prospect.

Heidi

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