My pet is considered one of the aggressive breeds, which I understand. For that reason, I remained with him, placed a muzzle on during exams, controlled him throughout all exams the same as I did with all regular vet visits. The purpose in taking him to Madison Veterinary Specialists was for examinations and tests not provided by his regular veterinarian. During the course of treatment he was sedated for X-rays and other examinations that would have been difficult to do otherwise which lasted an hour to an hour and a half. He was brought out still wearing the same very tight muzzle placed on him prior to the sedation and was very obvious it was never taken off. Upon reading the results of the examination, his mouth was never examined following sedation which was a potential source for the tumors or possible cancer. I spent a month agonizing what next step to take as there were no clear answers until it became obvious. His last day with me was peaceful and examination of his mouth showed signs of cancer. I understand being cautious around potentially aggressive dogs including mine which did growl. Please do not miss all areas of possible cancer in the future and remove the muzzle when those dogs are sedated if the purpose is to find possible source of tumors/cancer.