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Three hundred thirteen mixed breed steers (558 lb) were used to determine the effect of long-term management of native grass pastures on gain. Steers were allotted randomly to eight pastures previously grazed for 1/2 season (1 steer/2 acres from April to July 15, 81 days) or 3/4 season (1 steer/3 acres from April to August 15, 112 days) from 1990 to 1998. In 1999, all pastures were stocked at 1 steer/2 acres and grazed 83 days until July 15 or 16. The steers received free-choice mineral and were supplemented six times with 2 lb of 20% crude protein range cubes to aid in gathering. The steers on pastures previously grazed for 3/4 season gained faster (P

tions reflected their genetic characteristics. But Data from Kansas cattle auctions were analyzed to these studies did not examine the effect of physical estimate the impact a wide variety of physical char- characteristics on cow prices. Given the importance acteristics had upon cow prices. Weight, lot size, of cull cow revenue to cow-calf producers, and the health, pregnancy, grade, dressing percent, breed, existence of previous research demonstrating that time of sale, and market location were important physical characteristics can significantly impact catfactors affecting the differences in cow prices across tle prices, there is a need for research quantifying the lots on a given day. Results suggest that producers impacts of physical characteristics on cow prices. interested in maximizing the price they receive for PURPOSE OF STUDY

Mixed-breed steers (563 lbs) grazed burned, native-grass pastures (1990 to 1998). Steers were allotted randomly to graze native grass pastures for either 1/2 season (1/2) from April to July 15 (81 days, at 1 steer to 2 acres) or for 3/4 season (3/4) from April to August 15 (112 days, at 1 steer per 3 acres). The grass composition was measured in the first, fourth, and eighth years of the study. The economics of steers grazing the two systems were determined by calf and feeder cattle prices at Dodge City adjusted to southeast Kansas. The steers grazing 1/2 gained more per day (2.78 lb vs 2.48 lb, P

CEH heifers gained faster while on grass ling heifers were allotted randomly to three (P

Two trials were conducted to evaluate the effects of Fourplex®, a trace mineral supplement, on long-hauled stocker calves. In each trial, Fourplex was added to the ration of lightweight, long-hauled calves in four pens, while calves in another four pens served as controls. Additionally, every other calf that became sick, regardless of feed treatment, was drenched with a solution of Fourplex in Trial I and a Cu, Zn, Mn+Co solution in Trial II. Fourplex in the feed did not improve ADG, reduce morbidity, or reduce the number of treatments required per sick animal. In Trial II , Fourplex-fed calves that became sick required more treatments (P

In a 3-year study, crossbred steers averaging 585 lb were allotted to groups given either a control or zinc methionine-supplemented mineral mixture while grazing burned native pastures in early summer. The steers were monitored for weight gain and incidence of footrot. The addition of 100 lb Zinpro 100® (50% zinc methionine) per ton of free-choice mineral mixture improved (P

Fescue toxicity causes substantial production losses in sheep, cattle, and horses. These losses are attributed to an endophyte, Acremonium coenophialum. However, our results indicate that Quarter horse yearlings can be fed endophyte-infected tall fescue hay for at least 106 days with no detrimental effects on either growth or exercise performance. However, these findings have not been substantiated in other classes of horses or in horses consuming endophyte-infected fescue for longer durations.

Presponse is a new Pasteurella haemolytica vaccine in an inactivated, bacteria-free liquid containing leukotoxoid and bacterial surface subunit antigens, which stimulate toxin-neutralizing and bacterial-agglutinating antibodies. Pasteurella haemolytica infection is one of the major health problems of shipped calves. Therefore, the objective of this study was to determine if Presponse, when injected at arrival, would reduce sickness and improve gain of highly stressed, long-hauled calves.

One hundred and seventy, mixed breed, bull calves from Alabama averaging 294 lb were allotted randomly to either receive Micotil (4.5 ml of IM at arrival) or serve as controls. All calves were vaccinated with modified-live IBR+BVD+PI and Blackleg 3 (7-way), dewormed with levamisole, deloused with Lysoff®, implanted with Ralgro®, and castrated via banding. They were fed 4.5 lbs per day of a 15.5% crude protein milled ration plus prairie hay to appetite (average, 2.9 lbs).

One hundred and fifty-four bull calves shipped from Georgia wer e allotted randomly to receive 40 ml of either a water (control) or a Cu-Zn drench treatment. The Cu-Zn treatment contained 250 mg Cu from copper sulfate, 650 mg Zn from zinc oxide, and 400 IU of Vitamin E. Additionally, they were dewormed with Inomec®, implanted with Ralgro®, and mass medic ated with Micotil®. The calves were weighed on days 1, 14, 28, and 56. The calves were vaccinated at arrival with modified-live IBR+BVD+P I , 7-way 3 blackleg, and Presponse®. On day 28, they were surgically castrated. The calves were fed an average of 6.25 lbs per day of a 16% crude protein milled ration plus prairie hay to appetite (average consum ption of 3.7 lb/day).