North Dakota State University * Dickinson Research Extension Center
1089 State Avenue, Dickinson, ND 58601-4642 Voice: (701) 483-2348 FAX: (701) 483-2005


GTA Creep Block Study

James L. Nelson, Animal Scientist, and Douglas G. Landblom, Animal Scientist

In September 1992, a feeding study was started at the Dickinson Research Center to determine the intake of two "Creep Supplements" when fed to mixed breed calves pastured on native pasture in western North Dakota.

GTA provided two creep supplement types packaged in two hundred pound "tubs." One supplement contained a 14% protein high energy mix while the other contained a high protein (31%) mix.

The 14% creep was available to 39 crossbred calves grazing a 600 acre native pasture known as Pyramid Park starting on September 9, 1992 until the calves were weaned on November 5, 1992. This was a total creep period of 57 days or 2223 animal days (39X57). During this time the calves consumed 2900 pounds of the creep feed for an average daily consumption of 1.30 pounds per day. This group of calves had an average weaning weight of 585.3 pounds.

The "creep tubs" were placed inside a creep area made up of portable corral panels equipped with a gate that excluded mother cows. It was observed that the calves spent considerable time in this creep area licking and feeding the blocks. The creep enclosures were placed close to water so that the calves could stop by on their way to and from water.

The 31% creep was available to 53 crossbred calves grazing in Section 23 about six miles NW of Dickinson, N.D. The creep design was similar to the one in the Pyramid Park and was also located close to water. During the first week of October, the cows and calves in this treatment were given access to additional acreage of a harvested hay land with some small grain (oats) regrowth. Apparently this adversely affected the consumption of the creep feed, because consumption went down dramatically. However, after a couple of weeks, the calves started consuming the creep feed again. They consumed a total of 1925 pounds of creep feed in 2809 animal days for a consumption of 0.68 pounds per day. The actual weaning weight of the calves on November 2, was 526.1 pounds, almost 70 pounds less than the calves on the 14% creep.

It is difficult to explain the difference in consumption between the two groups of calves. Did the calves in Pyramid Park eat more creep because they were heavier or were they heavier because they ate more creep? Did the change in pasture on Section 23 cause a decrease in creep consumption or was the lower consumption due to the feed ingredients used in the high protein creep?

At this point in time, we can only guess as to the cause of the differences between the two creep rotations.

GTA Creep Block Study -- 1992

Cow No. Calf No. Weaning Wt. Cow No. Calf No. Weaning Wt.
H027 2513 544 H003 2554 446
B0x1 27 561 An802 2518 662
B0x2 2028 478 H821 229 556
B0x3 2013 555 H915 2506 536
B0x4 28 554 B960 272 557
B0x5 2018 518 H2036 2510 640
B0x6 2001 537 H2072 230 630
B0x7 2005 614 MS3004 255 648
B0x8 5 502 MS3010 2507 700
B0x9 2038 454 B3015 2016 571
B0x10 2050 237 MS3023 281 558
B0x11 12 479 MS3032 212 695
B0x12 2033 491 B3515 239 615
B0x13 2021 432 H3536 3 603
B0x14 2008 501 H3540 284 479
B0x15 36 581 H3551 214 614
B0x16 30 475 H3558 209 572
B0x17 53 441 H4023 2523 632
B0x18 18 488 MS4024 261 680
B0x19 23 600 MS4025 282 516
B0x20 21 564 MS4026 276 670
B0x21 34 533 MS4058 2522 684
B0x22 14 551 B4537 238 608
B0x23 2024 531 H4539 204 615
B0x24 41 537 H4552 2561 438
H1077 54 392 H4559 2517 720
B1087 48 566 H4560 50 568
B2037 2014 498 H4564 2043 509
MS3022 55 546 H5x10 2509 562
MS3025 2040 479 H5x12 219 605
MS3049 56 512 B5x22 2570 490
H3563 2040 388 B5x27 279 574
MS4019 2025 597 H5x31 254 619
H4027 2520 465 H5x39 213 496
MS4039 2037 632 An5113 270 695
H4514 267 590 B6x28 256 560
SM4519 40 497 B6x31 283 610
MS5003 2029 506 H4556 2526 680
MS5013 2035 478 H5x44 2529 605
MS5017 2046 513      
MS5018 47 614      
MS5020 11 608      
MS6002 266 758      
MS6006 42 670      
B6x4 2036 557      
MS7029 2030 598      
MS7031 2004 658      
B959 25 538      
B9x1 2048 405      
B9x11 2023 585      
B9x23 2044 504      
An703 2033 491      
    27884     23218
    526.1132     595.3333

 

Section 23 Pyramid Park
Date Lbs. Creep Date Lbs. Creep
September 10 200 September 9 200
September 19 200 September 17 200
September 24 200 September 21 200
September 30 200 September 23 200
    September 30 200
October 2 400 October 2 400
October 7 400 October 7 350
October 23 600 October 12 400
October 30 400 October 17 400
    October 20 800
    October 28 800
Total 2600 Total 4150
Weigh Back 675 Weigh Back 1250
Pounds Eaten 1925 Pounds Eaten 2900
Animal Days 2809 Animal Days 2223
Pounds/Day 0.68 Pounds/Day 1.3

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