Remove the collar from the pouch only at the time of application. Place the collar on the dog's neck, so that three fingers can be inserted between the animal's neck and the collar. In very rare cases, slight skin irritation may occur, so correct the placement of the collar. If irritation persists, remove the collar. In dogs wearing the collar for the first time, check frequently if redness appears on the skin. If irritation occurs, correct the fit of the collar, if it persists, remove the collar. Benefit It has an easy to fit double buckle system that provides security to the animals. Adaptable to any size and without loss of the active ingredient.