Yes, bed bugs bite animals. Dogs, cats, rabbits, birds, and rodents can all be targets, though bed bugs strongly prefer human blood. If humans are available, pets are rarely the first choice. But in heavy infestations, or when a home has been vacant and bed bugs are desperate for a meal, animals become fair game.
Which Animals Bed Bugs Feed On
The common bed bug (Cimex lectularius) evolved alongside humans and is adapted to feed on us. Its close relative, the bat bug, feeds primarily on bats. But bed bugs are opportunistic. When they’re hungry enough, they’ll feed on dogs, cats, birds, guinea pigs, and other warm-blooded animals. In laboratory settings, bed bugs are often raised on rabbit or chicken blood, which shows they can survive and reproduce on non-human hosts.
That said, bed bugs have a harder time navigating through thick fur or feathers compared to bare human skin. A pet sleeping in an infested room may get bitten less frequently than the person sleeping in the same bed, simply because the bugs have easier access to exposed skin.
Bed Bugs Don’t Live on Pets
One of the most important distinctions: bed bugs are not like fleas or ticks. They do not live on animals. They feed for roughly 5 to 10 minutes, then retreat to a hiding spot, typically a mattress seam, bed frame crack, or nearby furniture joint. Pets don’t carry bed bugs around the way they carry fleas.
In severe infestations, a bed bug might temporarily cling to a dog or cat while looking for somewhere to hide. But they won’t nest in fur, lay eggs on your pet, or set up camp on an animal’s body. Their eggs are deposited in dark, protected crevices near where their hosts sleep, not on the hosts themselves.
How Bites Affect Dogs and Cats
Bed bug bites on pets look similar to what you’d expect on people: small red, raised welts, often in clusters or lines. On dogs and cats, these bites tend to appear on the belly, inner legs, or ears, areas where fur is thinner and skin is more exposed. Many pets show no visible reaction at all.
Some animals scratch or chew at bite sites, which can lead to hair loss, skin irritation, or secondary infections if the scratching breaks the skin. If your pet is losing fur in patches or scratching persistently and you’ve ruled out fleas, bed bugs are worth investigating, especially if you’ve noticed bites on yourself too. The key clue is usually finding the bugs or their droppings (tiny dark spots) on bedding and furniture rather than on the animal.
Do Bed Bugs Spread Disease to Pets?
Bed bugs are not known to transmit diseases to animals or humans in real-world conditions. Researchers have studied whether bed bugs could carry Trypanosoma cruzi, the parasite that causes Chagas disease and is normally spread by kissing bugs. When bed bugs ingested blood containing the parasite, T. cruzi did survive in their gut and appeared in their feces. However, the parasite never reached the bed bugs’ salivary glands, which means it couldn’t be injected during a bite.
The other potential route, fecal contamination of a bite wound (how kissing bugs transmit Chagas), also appears unlikely. Researchers observed that bed bugs consistently moved away from their feeding site before defecating, and none defecated while actively feeding. This behavioral pattern makes feces-related transmission a very low risk. For practical purposes, bed bugs are a nuisance pest, not a disease vector for your pets.
Checking Your Pet’s Sleeping Area
If you suspect bed bugs are biting your pet, inspect their sleeping area rather than the animal itself. Look for the classic signs: tiny rust-colored stains on bedding (digested blood from crushed bugs or their droppings), shed exoskeletons that look like translucent husks, and live bugs hiding in seams, zippers, or cracks near where your pet rests. Bed bugs are about the size of an apple seed and are flat, oval, and reddish-brown.
Pet beds with removable covers should be washed in hot water and dried on high heat for at least 30 minutes. Bed bugs die at sustained temperatures above 120°F (49°C). If your pet sleeps in a crate, inspect the joints and corners carefully with a flashlight.
Treatment Safety Around Pets
Treating a bed bug infestation when you have pets requires extra caution. Many common bed bug insecticides contain permethrin, a synthetic compound that is generally well tolerated by dogs and larger mammals. Their bodies break it down efficiently before it can cause harm.
Cats are the major exception. Cats lack a specific liver enzyme needed to metabolize permethrin, making them highly sensitive to products with concentrated permethrin. Exposure can cause tremors, seizures, and can be fatal. If you’re treating for bed bugs in a home with cats, make sure any pesticide products are labeled as cat-safe, and keep cats away from treated surfaces until products have fully dried or as directed on the label.
Heat treatment, which involves raising the temperature of an entire room or home to lethal levels for bed bugs, is one of the safest options for households with pets, since it leaves no chemical residue. Pets need to be removed from the home during treatment, along with any heat-sensitive items like medications or aerosol cans. Diatomaceous earth (food grade) is another lower-toxicity option, though it works slowly and is best used as a supplement to other methods rather than a standalone solution.