I received the info from my vet at VCA listed below. On the surface I understand and I am in favor. However, at $100 visit this appears to be an effort to increase revenue flow for the largest held vetrinary company. While my current dog is young and healthy, I had two previous dogs that suffered from cancer and were treated during their surgeries with Tramadol and other meds. I believe the Board of Vet Medcine needs to strongly suggest that clinics allow for a certain amount of visits for pets being treated to encourage the clincs prescribing 7 day prescriprtions to  not use this as an opportunity to increase revenues. 

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For acute pain, a veterinarian may only prescribe a seven-day supply of a controlled substance containing an opiod. A veterinarian may prescribe an additional seven-day supply only after a re-evaluation of the patient.

For chronic conditions, in which a controlled substance containing an opiod is prescribed for longer than 14 days, the veterinarian must re-examine the patient at least every 6 months.