Genotypes that lose less weight during summer and autumn when feed quantity and quality is limiting could potentially be grazed at higher stocking rates and therefore increase farm profitability. To determine the potential value of breeding for reduced liveweight loss during summer and autumn whole farm systems modelling was used to predict potential changes to farm profitability for different ...

Equations presented predict the metabolizable energy (ME) content of feeds, and ME requirements for maintenance and production. New approaches are described for defining the maintenance requirements of penned and grazing animals, and the composition and energy of liveweight gains. The latter employs the concept of a Standard Reference Weight (SRW) to characterise the various breeds of cattle an...

A series of feeding experiments were undertaken with weaner cattle to assess the effects on liveweight performance of supplementing a basal diet of molasses, urea and roughage with various protein and energy supplements. The supplements included extruded soyabeans, a mixture of extruded soyabean and crushed maize grain, or soyabean and crushed maize extruded together. These experiments indicate...

20 one-month-old sanjabi suckling lambs (ten males and ten females with initial liveweight of 13.4 ± 1.3 and 11.6 ± 0.9, respectively) were used to assess the effect of ad libitum creep mixture on dry mater intake, live weight gain and carcass characteristics. the lambs were blocked within sex according to their live weight and randomly allocated to one of two treatments, control (free suckling...

This study aimed to establish whether sheep flock production losses due to nematode (worm) infections are typically greater in mature sheep selected for anthelmintic treatment at random compared to sheep selected for treatment based on low (poorer) body condition score (BCS). The study also examined the proportion of sheep in flocks that could be left untreated before production losses became e...

ABSTRACT This study aimed to determine the efficacy and parasite resistance of levamisole (LV) ivermectin (IVM) in beef cattle naturally infected with gastrointestinal nematodes, as well effect on liveweight gain a tropical wet region Oaxaca, Mexico. From November 2019 January 2020, sixty-six grazing calves were randomly allocated into three groups twenty-two animals each, treated LV or IVM an ...

OBJECTIVE To determine the prevalence of subacute rumen acidosis (SARA) in beef cattle grazing lush pasture and the effect of monensin on reducing SARA and improving animal performance. DESIGN Commercial Angus and Murray Grey steers received a monensin slow-release capsule (n = 19) or remained untreated (n = 19). Cattle grazed an oats crop or tetraploid ryegrass pasture for a total of 91 days...