a great book about allergies i really learned alot from was allergy solution for dogs
The Allergy Solution for Dogs by Shawn Messonnier (2... - eBay (item 260553943983 end time Mar-17-10 12:22:19 PDT)
it is excellent in explaining all about allergies
here is another book i like as well
Dr. Goodpet – Pet Allergies: Remedies for an Epidemic