what dosage and how many times a day do you give your gs pup benedrayl for allergies? my guy is 6 1/2 months, weighs approximately 65 lbs. i hate to give it to him, but, he is so itchy and making his skin red and sore from picking at it. it is mostly on his belly. but, honestly he is itchy all over. i think it's coming from tree pollen because that is when it started to bother him. thanks for your answers.