I do insure mine, but to be honest not because of colic surgeries or broken legs etc - because lameness diagnostics are so expensive! My first horse I spent £1500 just on work-ups, nerve blocks, bute trials and x-rays... and we had a diagnosis, but then couldn't afford the treatment. My last horse, when he went chronically and hard-to-diagnose lame, was uninsured, and I had to PTS him because I couldn't afford the diagnostics. So new one is insured... just in case he ends up lame more than anything else!!