Thankfully I wasn't alive when cattle were as big as horses, but I have been around long enough and I've heard enough reg. producers tell me that they are using this and that bull to reduce frame size because their herd just got too big there in the 80's. There's no doubt in my mind most people look back and think they had to have been crazy. But I wonder if 20 or 30 years from now we will be doing the same thing in regards to lowering frame size. In all the judging camps I've been to I've always been taught that frame 5, 6, and 7 is a good range for the modern beef cow. For me I think 5 and 6 is my ideal range, but that doesn't mean I'll get rid of a frame 6.1-7.0 cow just because she's a little bigger. I think some people are looking too much into the frame score thing. It's just one of the many heritable traits that a cow has. Alot of people talk about single trait selection, and I hope they realize JUST selecting for lower frame score can be an example of that.