Herbs for animals living in natural habitat are constant element in their diet. In sickness it may be observed sickness behaviour, that is specific for the species for getting better. It may be sleep and decrease nutrition or increase intake of specific. There was observed variety of feeding behavior of animals that in a reduced condition can instinctively find out suitable plants or bare space of the miry clay, which has the properties of stop diarrhea. Positive influence on animals organism have biologically active substances content in plants, for example dyes (flavonoids, anthocyanins, glycoside), tannin, mucilage, bitter, essential oil, alkaloids, terpenes, triterpenes, saponins, iridoids, naphthoquinones, anthraquinones, phenols, phenol acids and mineral salts. Biologically active substances in the appropriate amounts and proportions of the other compounds of plant treating gastrointestinal symptoms, relieve pain, they can be an antiparasitic agent, and have influence on the immune system. In different forms they are used in domesticated animal nutrition as alterative option for growth antibiotic and preventive condition rise.

The aim of the study was to describe rabbit’s kidney arteries and veins. Research was carried out on 40 New Zealand White Rabbits. The corrosion cast of the arterial and venous system was prepared by using Spofacryl. In 10% of the cases it was observed that the left renal artery was doubled. In one case the presence of an accessory renal artery in the right kidney was recorded. In 10% of the cases it was observed that the left renal vein was doubled. In 5% of the cases two left renal veins arose from the kidney and subsequently united to form a single vein about 1cm from the opening to the caudal vena cava. In 5% of the cases two left renal veins arose from the kidney and subsequently they united 1 cm away from the renal hilus. The anatomical knowledge of the renal arteries, veins and its variations are of importance in the experimental field.

The study was conducted in herd of primiparous Polish Holstei-Fresian dairy cows. Milk samples were collected during test milkings. The following parameters of milk samples were examined: total bacteria count, somatic cell count, milk urea nitrogen, total casein content, rennet coagulation time. Individual protein fractions were also determined. Changes in the characteristics of milk depending on the stage of lactation were analyzed. Conducted study has shown that the level of κ-casein in the XIII month of lactation decreases in comparison to the level of the III, IV, V, VII and VIII month of milking. No significant effect of lactation stage on the α-casein and α-lactoalbumin content in milk was observed. There was no statistically significant relationship between the day of milking, and the total casein content. The lowest somatic cell count was reported in milk from cows in VI, X and XII month of lactation (<180 000 · ml^-1).