Evaluation of the use of a copper and zinc chelate in the treatment of cows affected by digital dermatitis

The aim of this study was to evaluate the effectiveness of copper-zinc chelate spray in the treatment of digital dermatitis (DD). 39 limbs with DD injuries from 36 dairy cows were included, divided into three groups: group 1 treated with spray alone, group 2 with spray and bandage, and group 3 with spray and bandage only in the first 3 days. The cows were evaluated for locomotion score and qualitative analysis of the lesions on D0 (identification of the lesion and start of treatment), D3 (third day of treatment), D7 (seventh day of treatment) and D10 (tenth and last day of treatment). The results indicated that there were no significant differences between the groups in the analyzed variables. The three groups showed improvement in the locomotion score and regression from active to inactive lesion stages. However, at the end of treatment, active lesions were still present in both groups. It was concluded that the proposed 10 days of treatment were insufficient for complete healing of the lesions, suggesting the need to extend the days of application, given the significant regression of the lesions in the established period. More longterm trials are needed to evaluate the effectiveness of copper-zinc chelate spray.