BIO-ELEMENT STATUS OF THE FAIR OF DOGS RECEIVING FOOD WITH DIFFERENT SOURCES OF ANIMAL PROTEIN

We studied the features of the macro- and microelement composition of dog fur depending on different types of feeding and the use of dry industrial food with different protein sources. The studies were carried out on three groups of 2–5 year old dogs. The animals were kept in apartment conditions in Novosibirsk with double active exercise. The 1st group included 14, and the 2nd and 3rd groups – 16 dogs each. The first group received dry food with fish, the 2nd group - dry food with chicken, and the third - beef meat with offal, cereals, vegetables, cottage cheese and vegetable oils. The bioelemental composition of wool was studied on an Elan 9000 quadrupole mass spectrometer and an Optima 2000DV atomic emission spectrometer using inductively coupled plasma mass spectrometry and inductively coupled plasma atomic emission spectrometry. The most significant changes in the elemental status of fur were found in dogs fed dry food with fish. In this group of animals, the levels of mercury and phosphorus exceeded the reference values, and the quantitative values of cobalt, chromium, iron, iodine and manganese, on the contrary, were below the normal limit. The content of bioelements in the fur of dogs fed dry food with chicken or “natural” food in their diet was within the reference values. Distinctive features of dogs with a “natural” type of feeding were lower values of As, Ca, Hg, K and P in the wool compared to animals receiving dry food. The highest values of Al, B, Co, Fe, I, Li, Mn and lower concentrations of Na, Si and Sn were recorded in the fur of dogs eating dry food with chicken.