Dr. Marc Katz was found in violation of the Veterinary Practice Act by the Maryland Veterinary Board, Docket # 05-005, in February 2006. This is a matter of public record and can be verified with the Attorney General's office. Dr. Katz left my diabetic cat, who was his patient, in the care of his son -- a young man with no FORMAL veterinary training, who was not a licensed veterinary technician, and who was allowed to give insulin injections to my cat with NO supervision. According to their erstwhile admissions, his son picked up the wrong syringe to give my cat his insulin, and my cat subsequently went into severe hypoglycemic seizures, which according to the records of the hospital that cared for him afterwards, were due to a huge insulin overdose given by Dr. Katz son. For more on this story, see the Toonces Project at www.thetooncesproject.com.
Dr. Katz is, in my opinion, clearly irresponsible. Moreover, I believe that he lied to me in the wake of these events, and is both negligent and dishonest.
In summary, I think he is DANGEROUS and unethical. There are many more trustworthy and competent vets than he.
Why put your pets in danger? You need a vet you can trust. This is not the behavior of a trustworthy vet.