I haven't done a PPE yet but was planning to. I was unsure about testing for the IR as part of me wants to, but I've read a lot about IR and according to my reading its suggested that the test can trigger a laminitis episode which of course I don't want to do. I'm also not sure about cost. I contacted my vet but haven't heard back. Going to try again today as its been a week. They're a great vet but very busy. I currently have a horse believed to have IR though my old vet told me not to test her that "easykeepers" are all IR. She foundered but the pasture she was on was fertilized without my knowledge and the barn owner kept taking her muzzle off. Needless to say I found a new place to board and a new vet. But, I do keep my mare believed to have the IR on a dry lot with grass hay even though she hasn't been tested. She's done great, and looks great too. Perfectly sound for trails and has done so well! I'm trying to find a home for her as I have lost to much confidence to be the leader she needs as she can be anxious/spooky but will lead the trail ride and cross anything with a confident leader. Here's a pic of her :) I have found with her its not difficult to manage, just diet and exercise, so it doesn't terrify me of the possibility with Cinder, this new horse, but does concern me as I don't want a horse to founder. But its my understanding that can happen with any horse too.