An extensive genetic evaluation of cattle fattening performance was performed in this study. Fifteen SNPs in the LEP, FABP4, DGAT1, TG, IGF1, IGF1R, MYF5, LGB, CAPN1, CAST, GHR, and OLR1 genes were evaluated in 296 purebred Holstein–Friesian bulls using PCR-RFLP. This study clearly demonstrated that individual or combined effects of the genotypes at the selected genes may be effective on performance traits at different periods of animal growth and fattening.

Herbs and herbal feed additives are a valuable component in broiler chicken diets, affecting, e.g., health status, productivity and meat quality. In our study a herbal formula was applied in broiler chickens fed lower energy concentration diets. An interaction between experimental factors was not found, although a gainful effect on the productivity was noticed in broiler chickens fed diets with a herbal formula.

Rabbits from five litters weaned at the age of 5 weeks were observed. A number of social, exploratory, comfort, eating, resting and locomotor behaviours were observed. Aggressive behaviour was not observed. The majority of rabbits showed companion and place preference. Significant effects of group size and time of day on the frequency of some forms of behaviour were noted, e.g. rabbits performed comfort behaviour more often in the morning. Sex did not influence the rabbits' behaviour.