Okay. So being the ignoramus I am, I asked her what that means for the horse. She told me that the topline muscles are the ones that are good to build up for... um, reasons. Something like... those are the muscles he needs to have strong when he's being ridden? I think it was something like that. (Sorry, I'm really very new at this!)
In any case, I see folk here on the forum talking about horses' toplines all the time - this horse has a great one, that one's not so good. I gather it's something that's quite visible when the horse has a well developed topline... right? I gather it would be a good thing to know how to recognise and see, in my horse and others. So I'm asking you fine folk, who have waaay more experience in these matters than me (not hard!) to SHOW me! It'd be awesome if folk could post some pics of horses with great toplines (and some with less-good ones for comparison), and explain to me what I'm seeing there and how to recognise it myself.
Bring on those toplines, good and bad, and Edumacate me!