Physiological Effect of Gentle Stroking in Lambs.

Simple Summary: Gentle touch has been repeatedly shown to have a positive effect on livestock. The purpose of this study was to determine potential changes in physiological indicators in lambs subjected to gentle stroking. A total of 40 lambs of two breeds were assigned to two control groups (n = 20) and two experimental groups (n = 20). Lambs from the experimental groups received treatment (the gentle stroking procedure). Analyses consisted of determining the following parameters: heart rate (HR), saturation (S) and biochemical analysis. An increase in cortisol levels and a decrease in total protein levels indicate a disruption of homeostasis. At the same time, a significant increase in glycogen and a significant decrease in glucose and heart rate values suggest reduced stress levels. The results obtained in the experimental groups suggest that interactions with humans, even of a positive nature, can be a source of stress, but this is a transient and adaptive reaction. Interactions with humans can be a source of stress, but long-term and positive ones will lead to positive changes and easier handling of animals. The aim of the study was to determine changes in physiological indicators in lambs subjected to gentle stroking. The study included 40 three-week-old lambs (20 females of the synthetic prolific-meat (BCP) line and 20 females of the Świniarka (SW) breed). The animals were assigned to two control groups (n = 20) and two experimental groups (n = 20). Lambs from the experimental groups received treatment. Analyses consisted of determining the following parameters: heart rate (HR), saturation (S) and biochemical analysis. In the groups of sheep subjected to gentle massage, the analyses revealed a significant increase in the levels of cortisol, CAT, GST, GPx, among others, and a significant decrease in the levels of total protein, SOD, TAC, uric acid and Na+. At the same time, indicators of reduced stress levels were revealed, i.e., a significant increase in glycogen levels and a significant decrease in glucose and HR values. These results suggest that the introduction of gentle touch can induce positive states in lambs, and that the stress response may be transient and adaptive. Nevertheless, it is important to note that these interactions can be a source of stress, even if the behavioral response does not necessarily indicate stress. [ABSTRACT FROM AUTHOR]