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Nancy Kerns and Kathy Callahan, CPDT-KA
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Nancy Kerns is the editor of Whole Dog Journal. Kathy Callahan, CPDT-KA, is a trainer and the author of 101 Rescue Puppies: One Family’s Story of Fostering Dogs, Love, and Trust, who specializes in puppyhood coaching in Alexandria, Virginia.
Viagra or sildenafil is a treatment for the conditions known as megaesophagus, a condition that causes dogs to regurgitate their food. It is a bit awkward picking it up at the pharmacy.