Current research on stress alleviation in dogs during separation and transportation primarily focuses on the effectiveness of pharmacological treatments, either alone or in combination with behavioral modification programs. Clomipramine, an antidepressant commonly used to treat separation-related disorders, has been found to decrease destructive behavior, inappropriate defecation and urination, but not vocalizations. However, it may cause vomiting and sedation as side effects.
Similarly, fluoxetine administration can reduce separation-related behaviors but may also lead to lethargy, loss of appetite, seizures, and depression in certain dogs. Many of these drug interventions require daily administration for several weeks before noticeable improvements are seen, and their reported efficacy varies. Pheromone-based substances, which are commercially available and considered safe and convenient, have been shown to reduce some signs of canine stress during car travel and separation periods. However, the responses to these substances are not consistent among all individuals.
The administration of cannabidiol (CBD) is becoming increasingly popular, as pet owners perceive it as a natural treatment. CBD is a non-psychoactive phenolic cannabinoid derived from hemp processing. It has been shown to have positive effects on both human and non-human animal health through the endocannabinoid system, which regulates pain and inflammation. CBD has been found to reduce stress-related signals that can cause chronic inflammation and pain in humans.
It may also be effective in treating anxiety. The exact mechanisms by which CBD produces these effects are complex and not fully understood. It acts as an allosteric modulator of CB1 and CB2 receptors in pain neurons, as well as an agonist and antagonist of other receptors in the immune and central nervous systems. CBD is also being used more frequently in veterinary medicine. Studies have shown that short-term oral dosing of CBD up to 20 mg/kg daily and single oral gavage dosing of 62 mg/kg do not have significant adverse effects in healthy dogs.
A 6-month safety study found that a daily oral dose of 4 mg/kg was well-tolerated in healthy dogs. However, there is limited empirical knowledge regarding the efficacy of CBD in dogs, with most studies focusing on its effectiveness in relieving pain from osteoarthritis. There is limited evidence supporting the use of CBD in alleviating stress or anxiety in pets, and previous studies have not shown a positive effect. Despite this, there are many commercially available products claiming to support the emotional health of dogs and dog owners resoundingly affirm that it offers improvement.