The article is devoted to the quantitative characteristics of the small intestine wall layers echoicity of dogs with parvoviral enteritis, their ratio and comparison of the results with the index of healthy animals intestinal echoicity. The object of the study was 53 heterogeneous dogs of both sexes with confirmed polymerase chain reaction diagnosed with parvoviral enteritis at the age from 6 weeks to 7 months. The studies were carried out at the Pirogov Veterinary Center of Stavropol and SD&TVC at FSBEI HE "Stavropol State Agrarian University"on the SIUI Apogee 1100 scanner (Shantou Institute of Ultrasonic Instruments Co., Ltd., Guangdong, China) according to the generally accepted method using a multi-frequency linear sensor with a frequency of 7-12 MHz in B-mode. It was found that each layer of the jejunal wall (mucous, submucosal and muscular) of examined dogs was homoechoic and the intestine echoicity index of sick dogs increased for the mucous layer - 2.54 times, submucosal - 1.1, and muscle - in 1.3 times compared with healthy animals' index. Intestinal echoicity index determination provides objective information about changes in the main ultrasound parameter during ultrasound of alimentary tract structures.