I noticed one of the mares in the mixed auction passed away on the day before the auction started. In a way a good thing as nobody bid on her but what I’m curious about is having looked at the FAQs horses tend to die from age of 15 onwards. The mare in question (Preppy Indian) was born 2003 so she’s only 11. Is there any reason specifically why she might have gone early so to speak? I know it’s not particularly important but I’m a bit puzzled 
I think it is random so the average is obviously 15 onwards, but the code has some extremes thrown in there.
Her last foal was born on July 16, so she died in foaling. “Natural” death (i.e. old age) is 15+, but obviously mares can go earlier due to foaling complications (and/or having twins).
What Shanthi said 
Ah, I didn’t notice when she foaled. That explains it. Thank you!