Benadryl helped Taz with his allergies from walking in the grass. He would lick his paws raw, until the vet tried it. I didn't like how sleepy it made him, so the area where he did his business, I put pea gravel down and it was great after that. To this day I still have that area for Jonas and no problems. Benadryl also was given to Jonas when I picked him up for his 4 hour ride when he was 8 weeks old. It worked wonders and he slept like a baby for the whole ride.