Cow Calf Corner Paul Beck: Cowherd Management’s Role in Driving Carcass Weight

In the past few weeks, I have discussed observations on the increase in cow mature body weight and in relation to increasing carcass weights. This week I will look at the effects of other cowherd and pre-finishing factors that impact the recent increases in carcass weight.

We compiled a dataset from calf carcass outcomes connected to mature cow bodyweight (n = 4,917 records) from cowherds in Texas, Oklahoma, and Louisiana to look at cowherd management’s effect on hot carcass weight of their offspring. In this analysis, steer and heifer calves were from fall and spring calving herds and were finished either directly after weaning as calf-feds or as yearlings following pasture-based backgrounding systems.

We found that for every 100-pound increase in cow mature bodyweight, carcass adjusted calf final BW increased by 28 pounds and hot carcass weight increased by 18 pounds. The efficiency of carcass per 100 lbs. of cow weight declined by 4.1% (Table 1) as cow mature weight increases. Fall born calves had 35 lbs. lower HCW than spring born calves, heifers had 53 lbs. reduced HCW than steers, and calf-feds had 53 lbs. lower HCW than yearlings.

We calculated the impact of feeding calves for longer days on feed, similar to current feeding practices, resulting in higher fat composition of cattle at slaughter. At 28% fat, we consider cattle to be at a low Choice quality grade, increasing to 32, 36, and 38% improves the quality grade potential and increases HCW by 87, 185, and 247 lbs., respectively.

This analysis suggests that the majority of the increase in HCW observed in the last two years is likely from feeding cattle to higher fat endpoints with longer days on feed. Also, it seems logical that it is more biologically efficient to feed yearlings following a stocker grazing program out of lighter BW cows than feeding calves out of heavier dams directly after weaning. To highlight this, we created 2 scenarios with spring born steer calves. In scenario 1 we used 1,200 lb BW cows (average of our dataset) with calves fed as yearlings to 32% body fat. In scenario 2 we used 1,500-pound dams with calf-fed steers finished to 32% body fat Even though the cows were 300 pounds lighter, feeding the offspring of the lighter BW cows in scenario 1 as yearlings offset any advantage production advantage of the larger cows.

Increasing mature cow size increases absolute calf and carcass weights but reduces efficiency when expressed relative to cow maintenance requirements. These results suggest that increasing cow mature weight is the least efficient path to heavier carcasses. Instead, matching cow size and calving season to the production environment improves system productivity and resilience. Efficiency of the entire beef production system will be optimized by matching cow size and calving seasons to ranch environmental conditions, increasing productivity of heifers to match steers, and utilizing pasture-based stocker/backgrounding programs pre-finishing.

Is bigger always better? Dr. Paul Beck, Oklahoma State University Extension Beef Cattle Nutrition Specialist, discussed cow size and carcass weights in the beef industry for the March 19, 2026 installment of the Ranchers Thursday Lunchtime webinar “Tug of War in the Cattle Industry” series. https://www.youtube.com/watch?v=WbCM1G7CCSo