Richard. I’m interested in your opinion on starting a 2 year old? I have an ottb (who was obviously started as a two year old….. with all the battle scars to prove it.) I also have a 2 year old qh cross that was started at 2 who is doing amazing. She was ridden under saddle for short rides <15minutes at a time 2-3 days a week consistently for a month or so. Very differently from how a 2 year old racehorse is trained (2 hrs on the walker and sometimes up to 1-2 hrs under saddle depending on the trainer.) 

There’s a lot of info out there that suggests lightly riding two year olds actually strengthens their bone development. My vet concurs. You’ve started way more horses than my vet though….. So, I’d really like your personal opinion on the topic (before I start lightly riding her 2-3 times a week myself?)