EN
The goal of this study was the assessment of the influence on both insulin and growth hormone levels in lambs blood of blood meal and Wroclaw product - dry brown livex (modified by whey). Experiments were carried out on 30 young Polish "wielkopolska" lowland - sheep - wool type, aged 3-4 months. Livex and blood meal constituted 2% of forage. Blood samples for radioimmunologic examinations (GH and insulin level determination) were taken 1 hour before feeding, directly before feeding and 1.0, 1.5, 2.0, 3.0, 5.0, 6.0 and 8.0 hours afterwards. During the experiment higher levels of insulin and GH were observed in animals fed with livex and forage mixture than in animals fed with blood meal and forage mixture. Livex caused a bigger body mass increase (mean increase 27.3%) in comparison with animals fed with control forage. Although neither livex nor blood meal are hormone preparations, changes in insulin and growth hormone levels were observed.