A.Given the paw licking, your beagle’s condition sounds more like a systemic allergy problem rather than just local irritation from the collar. I am concerned that she has shown no response to medications as strong as steroids, Benadryl and Claritin. Despite routine skin scrapings coming out negative, I have seen cases like this wind up being the itch mange named sarcops.
Although this condition is treated with harsh medications, I have seen non-toxic selenium sulfide lotion shampoo show success. This is a medication needing a veterinarian’s prescription. Homeopathics I have used include Allergy by BHI or Skin Aid by Complementary Health Formulas.
The herbal Spring Tonic by Animals Apawthecary or Zaocys by Seven Forests, and the anti-inflammatory supplement Betathyme by Best for Pets along with a good fish oil could also help. However, I remain leery about their success when stronger medications aren’t bringing even temporary relief. You may have to seek out a good integrative veterinarian.