The impact of a new treatment and prophylactic complex «DLK» (dironet, lactobifadol, keratin) on the area and weight of the pelts of Arctic silver foxes of captivate breeding, during spontaneous invasion by Toxascaris leonina nematodes was studied. The studies were conducted on slaughter young animals – Arctic silver foxes (males at the age of 1.5–2 months and culled females of the main herd at the age of 5–7 years), bred in the conditions of LLC «Animal Breeding Farm «Vyatka» of the Kirov region. The animals were formed into 7 (males) and 4 (females) groups. Animals from the groups 6 and 7 received «DLK» additionally with the diet; the 1st group of control animals wasn’t invaded; the 2nd group consisted of invaded animals. After the winter hair maturation (November) the animals were killed, and the area and weight of the pelts were determined after primary processing, and the economic efficiency was calculated. The positive impact of «DLK» on the pelts’ area was found – in the male experimental groups (5, 6) the pelts’ area was higher by 9.2 %, and in the 4th experimental female group it was higher by 1.5 % compared with the control. The weight of flint-dried pelts of the same groups had no significant difference in comparison with the 1st control group. The economic effect in the 5yh male experimental group was +10 875,3 rub., in the 6th male experimental group +10 834,6 rub. and in the 4th female experimental group + 375,2 rubles in comparison with control and invaded animals.

Konovalov Andrey P., Vasilevich Fyodor I., Shumilina Natalia N.

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