I know there are plenty of threads discussing the topic of starting 3 year olds and it can be a rather controversial subject; however, I haven’t seen one up to date that discusses the actual scientific evidence on both sides and I am curious what the jurisdiction is based on that evidence.
I have heard both sides of the topic: (1) that starting early may contribute to later soundness issues, which may result from premature weight baring and (2) that light weight baring early-on may facilitate bone re-modelling during the growth phase, lending to prevention of breakdown.
Moreover, I have a question regarding genetic predisposition of breakdown/soundness and whether this may be an extraneous variable explaining why the evidence is so contradicting in this topic? There is various accounts of performance horses, particularly those in dressage, being bred for movement and losing longevity. I recall one thread on here, where a german vet was discussing the topic in dressage bred horses. Linked: German vet discusses flawed breeding and issues with movement I’d love to hear thoughts on that.
I thought this may be an interesting conversation to have to discuss both sides of the topic in regards to the evidence available.