Fireworks harm animals through extreme noise, sudden flashes, and toxic residues, which cause intense fear, physical injury, and long‑term health problems.

Up to about half of dogs and cats show fear of fireworks, with behaviors such as shaking, hiding, pacing, drooling, and attempts to escape. This intense stress can mimic post‑traumatic reactions, and repeated exposure can create or worsen noise phobias that persist long after the event. Panic drives many pets, livestock, and wild animals to flee; some become lost, are hit by cars, or injure themselves on fences and other obstacles.

Wild birds and other wildlife may take frantic flight during firework events, abandoning roosts and nesting sites and showing erratic flight patterns that increase collision and mortality risk. Radar and field studies have documented huge spikes in birds taking off on nights with big firework displays, with some species leaving their habitat or losing critical rest and feeding time, which can affect survival, especially during breeding or migration. Similar disturbance has been reported in marine and coastal animals such as seals and shorebirds near coastal firework shows.​

Startled animals can suffer injuries from running into obstacles, trying to jump barriers, or getting tangled in enclosures, and some farm animals and horses die as a result. Firework debris can be ingested by wildlife or grazing animals, leading to poisoning or digestive blockage, and sharp fragments can cause direct physical harm. In extreme cases, the acute stress response itself (for example, heart rate spikes in birds) can lead to collapse or death by fright.​

Exploding fireworks release fine particulate matter and gases, plus metals such as lead, strontium, and copper, which can contaminate air, soil, and water and harm respiratory and overall health in humans and animals. Perchlorates and other chemicals from fireworks have been detected in waterways, and plastic components and residues contribute to litter and microplastics that enter food chains and affect wildlife over time.​

No creature deserves to be traumatized by fireworks for even one night. By switching to silent fireworks, drone shows, or laser light shows, you can still offer a fun celebration that is safe and respectful of all animals and humans.