The Pet Hydration People LLC offers LICKS for Dogs, an all-natural line of canine liquid vitamins. Each portion-controlled packet includes antioxidants and is formulated with premium ingredients, according to the company. There are three formulas in the line. JOINT+HEART Signature Formula is an everyday supplement containing omega-3 fatty acids (wild-caught sardines and anchovies) for healthy skin and coat, glucosamine for mobility and vitamin E for immune system support. ZEN Calming Formula is a holistic remedy for anxious or aggressive dogs containing chamomile root, tryptophan, theanine and ashwagandha root. ATHLETE Active Formula contains a proprietary blend of amino acids to help accelerate muscle recovery and high dosages of omega-3 fatty acids (wild-caught sardines and anchovies) for joint and cartilage support.