The first thing veterinarians do to treat Addison’s disease in dogs is to resolve the crisis. The Merck Veterinary Manual lists an adrenal crisis as an acute medical emergency. Your dog will be hospitalized and will undergo intensive therapy to manage the symptoms of the crisis. Once your dog is out of immediate danger, your veterinarian will prescribe a replacement hormone medication to help your dog deal with the deficiency. There's usually more than one medication prescribed: an injectable mineralocorticoid (usually DOCP) monthly and a daily steroid (prednisone). Also, a veterinarian will usually recommend annual or biannual blood work to ensure the medication is working properly.
Another cause of not eating well would be any of a range of swallowing disorders. there’s a good video on canine swallowing disorders on youtubecreated by Dr Stanley Marks DVM at UC Davis , GI tract expert with great interest in such disorders.. megaesophagus would be included in this categoryAnother method to know for megaesophagus is use of the “Bailey Chair” which supports the dog in a position where his spine and espophagus are upright in a vertical position, thus gravity helps the pureed food move downwards.. One can find plans for building such a chair on the Web.