A frequently discussed, and sometimes heated debate on this site is optimum cow size. Check out the 5-23-20 issue of Iowa Farmer Today for an interesting piece on the subject. According to Kansas State Research and Extension beef specialist Bob Weaber, "Our results showed that in eastern Kansas, a 1,300 to 1,400 pound cow was optimum in that she was able to produce a moderate to high level of milk in an environment where all her nutritional requirements were met." There was some dialog on the effects of increasing cow size and the amount of beef produced per acre. The article pointed out several times that there was no one size fits all in regards to cow size. The study listed 7 main factors to consider. Interesting reading. My interpretation is that if it works for you, go for it.