Thirty-eight Angus-based, crossbred, nulliparous beef heifers (BW = 280 ± 26.3 kg) sired by 2 Angus sires were used to determine if dam BW affected heifer performance, DMI, residual feed intake (RFI), and endocrine markers. Heifers were housed in individual pens (2.2 by 9.1 m) equipped with 2.2 m of bunk space and fed a diet (90.4% DM, 13.7% CP, 67.2% NDF, and 56.2% TDN) consisting of 87.2% ber...

Zeranol implants were administered to 250 crossbred heifer calves at 1, 6 or 9 mo of age to evaluate growth, reproduction and calving performance. Heifers were assigned to eight treatment groups with 25 animals per group. Two additional groups of 25 heifers each were used to study the effects of multiple implants at two levels of nutrition on heifer performance. Implants at 1 mo of age (brandin...

The present research was carried out to define the biometric traits of HF Crossbred Cattle from Livestock Research Station, AAU, Anand; Sarsa Heifer Farm - Amul Dairy, Ode Semen Station Anand. recorded on 506 and those are body length (BL), height at wither (HW), hip (HH), heart girth (HG), chest depth (CD) width (WH), live weight (BW) age. All data were grouped sex-wise. Principal component an...

Ninety crossbred beef heifers averaging 260 kg were blocked by weight and allotted randomly to 15 pens of six heifers each, with three replicates per treatment. The treatments were spayed heifers (S); intact heifers (I); S + Synovex-H7 (SH); I + Synovex-H (IH); and S + Synovex-S7 (SS). The heifers were spayed vaginally with a Willis instrument; intact heifers were rectally palpated for reproduc...

A 3-yr study was conducted to determine the effect of heifer development system on ADG, reproductive performance, and subsequent feed efficiency as a pregnant heifer. Crossbred Angus heifers (n= 299) were assigned by initial BW to be developed grazing corn residue (CR) or in a drylot (DL). Corn residue heifers grazed native pasture 33 d prior to grazing CR 73 d. Corn residue heifers were then p...

AIMS: To investigate factors associated with pregnancy rate in a number of herds of contract rearing replacement dairy heifers. These factors included the average daily gain of a heifer mob, the average bodyweight of the mob at the start of grazing, the number of heifers in the mob, the length of the grazing period, the breed of heifers, the grazing season and the region from where the heifers ...

Congenital defects present at birth occur frequently in cattle (Leipold and Dennis, 1986) and these defects may enhance perinatal mortality, decrease maternal productivity and reduce the value of defective neonates (Rousseaux, 1994). The factors responsible for causing the abnormalities are genetic, environmental or a combination of these factors (Roberts, 1971; Rousseaux, 1994). Congenitally f...