What are you slavering about, reet? What propensity is this you are referring to?
The only horses I have regularly called dogs on these pages are Grandouet (who never cost me a bean - ever) and latterly MTOY, who whilst he has cost me a few quid over the years, is one I'm recently on record as saying that I am itching to back in a handicap. Well, them two plus Harchibald - and that was mainly to wind-up trackside, who is never here any more - and it hardly counts because he is most definitely a dog.
In the case of Yanworth, my post was caveated by the 'on-standby' bit - which was a direct reference to first-time head-gear, and nothing more than mischief.
So you can stick your 'propensity' right up your chute, quite frankly.