Knowledgebase Help Videos How to make changes to your active subscription? How to Cancel a Dr. Fossum's Subscription? How To Place Your Active Subscription on Hold? Unboxing the Rejuvenator Tincture - Dr. Fossum’s Pet Care Press-in adapter Tutorial - Dr. Fossum's Pet Care Quick Tutorial on how to use the Oral Syringe for the Rejuvenator Tincture - Dr. Fossum's Pet Care