HELP! I just took both of my dogs off of the Benadryl and started the Claritin today... Can anyone give me some advice. We are also in the process of switching to grain free dog food.. I believe in my heart that it is the dog food that is making them itch so much, cause my other dog is still eating puppy food and she does not have a problem (knock wood). I gave them the 24 hour Claritin melt in your mouth tab - much easier then getting the Benadryl down. I am sure I will be going back to the vet this week too!