A look at relevant posts on these platforms does seem to show evidence that CBD helps reduce firework and noise sensitivity in a majority of dogs.
In one Reddit thread where dog owners asked for 4th of July fireworks advice, several commenters mentioned that CBD had worked for their pets:
“CBD oil has worked wonders for my dog. 3-4 drops in her food in the morning and at night (she’s a 70lb boxer). She still notices the booms if they’re loud enough, but she doesn’t pant and tremble uncontrollably anymore. I don’t think she’ll be 100% chill on July 4th because of the sheet amount of shit that gets popped off, but I don’t think she’ll be cowering in the bathroom again this year.”
Other dog owners discussing strategies for managing pet anxiety during fireworks on dogforum.com also had positive things to say about CBD supplementation:
“I used CBD oil for Murphys firework anxiety last year but you have to start at least one week before so that it has a chance to build up .. ( I have to say it worked quite well all but the loudest and closest explosions were ignored)”
At the same time, a sizeable number of dog owners report disappointing effects from trying CBD oil with their noise phobic pups.
This perspective was represented in a 2020 study published in Frontiers in Veterinary Science, which exposed dogs taking CBD to simulated firework noise. The study found no significant difference in reaction between dogs taking CBD and those that weren’t:
“When the fireworks track started, there was a visible change in the demeanor of the dogs… a tucked tail, shaking, or nervous vocalizations like whining.” However, the study didn’t ultimately find any evidence “in support of an anxiolytic effect of CBD in dogs when supplemented at 1.4 mg CBD/kg.”
Although, it’s worth pointing out that most experts recommend giving dogs CBD for several weeks before expecting to see any effects. The authors of the study recognized this, writing that “CBD may need to be dosed for longer than 7 days in order to produce anxiolytic effects.”