The present study aimed to evaluate the possibility of using undecylenic acid, extracted from castor oil (Ricinus communis), as an antiseptic in dogs (Canis lupus familiaris). For this purpose, a prototype of a treadmill, made of castor resin, covered with an acid impregnated adhesive mat, on which the animals of the study were walked, was used. The work was developed with 54 dogs and the samples of the swabs o...