Liquid dispenser for watering animals

A liquid dispenser for watering animals, which comprises a main body including a main duct, wherein the main body develops along a longitudinal axis from a rear side to a front side of the dispenser, wherein an animal can drink, from the front side of the liquid dispenser, liquids dispensed through the main duct, wherein a stem is arranged in the main duct and includes a head urged by elastic means towards the main duct, wherein an auxiliary body is fixed to the main body and includes an auxiliary duct, wherein the head of the stem and the elastic means are arranged in a chamber connecting the main duct with the auxiliary duct, wherein the auxiliary body is fixed to the main body by means of extensions engaged with protuberances to prevent reciprocal axial movements between the main body and the auxiliary body, wherein the protuberances are spaced apart to form channels and the extensions are spaced apart to form notches, each notch being comprised between two extensions, wherein a locking element is fixed to the main body and/or to the auxiliary body, wherein the locking element comprises a collar provided with a plurality of ribs which are arranged in the channels and/or in the notches to prevent mutual rotations around the longitudinal axis of the main body with respect to the auxiliary body.