This investigation aimed to determine the effects of some environmental factors on fertility traits and economic losses caused by deviations from ideal levels these parameters. The records 126 Holstein Simmental first-calf heifers three dairy cattle enterprises in Afyonkarahisar during period 2010 – 2016 were examined. technique ANOVA used detect different related calculated. ages at first calv...

Holstein bull calves (n = 48) were purchased from local sale barns at 3 to 7 d of age and were assigned randomly to a 2 x 2 factorial arrangement of lasalocid in milk replacer (0 or 80 mg/kg) and in calf starter (3 or 44 mg/kg of dry matter). On d 10 after arrival, calves were orally dosed with 100,000 Eimeria oocysts. Intakes of calf starter and milk replacer, body weight (BW), BW gain, excret...

This study was conducted to investigate the effects of dry period length (DPL) on survival rate, gender, growth performance, mortality Holstein calves. Data belonged 800 cows in different parities (2nd, 3rd and ≥4th) calves delivered by these cows. DPL were classified 5 categories (≤40, 41-50, 51-60, 61-70, ≥71 days). Calves weighed body dimensions (body length, wither height, hearth girth) at ...

Mortality in dairy cattle is not only relevant with regard to economic losses but also to animal health and welfare. Thus, the aim of this investigation was to explore the genetic background of postnatal mortality in calves and replacement heifers in different age groups until first calving in Danish Holsteins. Records of Danish Holstein heifer calves born in the years 1998 to 2007 were extract...

This report describes a case of patent ductus arteriosus (PDA) which was found in a calf during an experiment on an implantable ventricular assist device. This is the first case report of PDA confirmed in the calf in Korea.

A rare complex dysraphic malformation, comprising segmental spinal dysgenesis with caudal agenesis, was found in a Holstein calf that was unable to stand and was slightly short at the lumbosacral spine with taillessness. The thoracolumbar and sacrococcygeal regions of the midline axial segments showed severe deformities. In the spinal cord, the thoracolumbar region showed severe constriction wi...

A 40-day-old male Holstein breed calf with a complaint of inability of moving the tongue in and out aswell as difficulties with breastfeeding was referred to the veterinary clinic. A notch in the middle of thetongue tip was evident during oral examination. In addition, a thin tissue band between the ventral surface of the tongue and floor of the oral cavity was seen in the calf. A diagnosis of ...

A case of disrupted embryonic development of the genital tract in a newborn Holstein calf is described. The physical examination of the calf evidenced several abnormalities, like atresia ani, rudimentary external genitalia and caudal vertebral agenesis. On necropsy, the excised genitalia consisted of bilateral streak gonads, apparently normal uterine tubes, a fluid-filled uterus, a long vagina ...

Anterior uveitis clinical signs include epiphora, conjunctival erythema, reduced intra-ocular pressure, corneal edema, miosis and ocular discomfort, among others (Gelatt, 1999). It is presented as a bilateral entity when occurring as a consequence of a systemic disease (Slatter, 1990), which it is commonly associated (Whitaker et al., 1998). Among the most common diseases in bovine are neonatal...

The main objective of this study was to describe Holstein neonatal growth and development as influenced by dietary zinc supplementation and the CD18 genotype, both of which may affect immune competence. Holstein calves (n = 421), after being fed colostrum, were brought to a calf facility, randomly assigned to one of four zinc supplementation groups (control at 40 mg Zn/kg DM or the control diet...