Sleeping with your dog isn’t inherently dangerous for most healthy adults, but it does come with measurable trade-offs. Your sleep quality takes a small hit, you’re exposed to certain pathogens and allergens, and behavioral issues can develop in some dogs. Whether those trade-offs matter depends on your health, your dog’s hygiene, and how you share the bed.
How Dogs Affect Your Sleep Quality
A study from the Mayo Clinic tracked both humans and their dogs with wrist-worn activity monitors over seven nights. People who slept with a dog in the bedroom maintained about 81% sleep efficiency, which is within the normal range. But there was a clear difference depending on where the dog slept: people who let the dog on the bed had significantly lower sleep efficiency than those whose dog simply slept in the room.
The average person in the study spent about 71 minutes awake after initially falling asleep. Dogs move, reposition, scratch, and shake throughout the night, and each of those micro-disturbances can pull you into lighter sleep stages even if you don’t fully wake up. If you already struggle with insomnia or light sleeping, having a dog on the bed will likely make things worse. Keeping the dog on a bed of its own in the same room is a reasonable middle ground that preserves the comfort of closeness without as much disruption.
The Emotional Upside Is Real
Physical contact with your dog triggers the release of oxytocin, the same bonding hormone involved in parent-child attachment. At the same time, cortisol (your primary stress hormone) decreases during dog-owner interaction. For people dealing with anxiety, loneliness, or PTSD, sleeping near a dog can provide a genuine sense of security and calm that outweighs the minor sleep disruption. Many people report falling asleep faster with their dog nearby, even if their overall sleep is slightly more fragmented.
Interestingly, the hormonal picture isn’t identical for the dog. Research has shown that while owners experience lower cortisol during interaction, dogs actually show increased cortisol levels. This doesn’t necessarily mean your dog is stressed by sleeping with you, but it’s worth noting that the arrangement isn’t automatically soothing for both parties.
Infection and Parasite Risks
The hygiene concern is the one most people think of first, and it’s not unfounded. Medical literature has documented several zoonotic infections linked to close contact with pets in bed, including Pasteurella (a common bacteria in dog saliva), MRSA, Capnocytophaga (a rare but serious bloodstream infection from dog saliva), and Chagas disease. Fleas and mites can also transfer during co-sleeping, with cheyletiellosis (a skin condition caused by mites) specifically noted in the research.
That said, these cases are uncommon in healthy adults with well-maintained pets. The risk rises sharply for people with weakened immune systems, including those on chemotherapy, organ transplant recipients, people with HIV, and the elderly. If you fall into any of these categories, the risk-benefit calculation shifts meaningfully toward keeping your dog out of the bed.
For everyone else, basic prevention goes a long way: keep your dog current on flea and tick prevention, maintain regular deworming, and wash your hands if your dog licks your face before bed.
Allergies and Asthma
Dogs produce multiple allergens through their skin, saliva, and urine. These particles are microscopic and cling to bedding, pillows, and mattresses. If you have mild pet allergies and still choose to share a bed, you’re essentially marinating in allergens for eight hours. Even people without diagnosed allergies can develop nasal congestion or worsened breathing over time from sustained nighttime exposure.
If you notice morning stuffiness, itchy eyes, or worsening asthma symptoms, the bed is the first place to look. Washing all bedding weekly at a minimum temperature of 140°F helps reduce allergen buildup. A HEPA air purifier in the bedroom can also cut airborne dander levels, though it won’t eliminate what’s already embedded in your sheets and mattress.
Children and Dogs in Bed
Between 35% and 80% of children sleep with their pets at least some of the time, depending on the study. Research on sleep quality in kids and adolescents who share a bed with pets has found no significant positive or negative impact on how well they sleep.
The bigger concerns for children are allergies and bite risk. Children are the most common victims of dog bites, and a normally gentle dog may snap reflexively if a sleeping child rolls onto it, kicks it, or startles it during the night. Asthma and allergies are also more common in children, and sustained nighttime exposure to dander can trigger or worsen symptoms.
Infants should never share a bed with a dog. The suffocation risk that applies to adult co-sleeping with babies extends to pets, and very small puppies face the reverse danger of being crushed or rolled onto.
Behavioral Problems To Watch For
Most dogs sleep in their owner’s bed without developing behavioral issues. But some dogs begin to treat the bed as a high-value resource and guard it. Resource guarding can start with subtle signs: a stiff body posture when you or a partner gets into bed, ears pinned back, lip licking, or physically blocking a spot on the mattress. Left unaddressed, these behaviors can escalate to growling, snapping, or biting.
If your dog growls when your partner approaches the bed, or becomes rigid when you shift position at night, that’s an early warning sign. Relaxation exercises and structured training can help, but in the short term, moving the dog to its own sleeping space is the safest response. Dogs that resource-guard beds aren’t being “dominant” in some outdated pack hierarchy sense. They’ve simply learned that the bed is valuable and feel compelled to protect access to it.
Keeping a Shared Bed Clean
If you’re going to share your bed with a dog, washing frequency matters more than most people realize. The International Forum on Home Hygiene recommends laundering pet bedding once a week. For your own sheets and pillowcases, the same weekly cadence applies, with a bump to twice a week if your dog spends time outdoors frequently, has skin conditions, or sheds heavily.
Water temperature is important: wash at a minimum of 140°F to kill bacteria and parasites effectively. Use detergent and, when the fabric allows it, chlorine bleach. A mattress protector adds another barrier between dog dander, saliva, and your sleeping surface. Wiping your dog’s paws before bed and keeping a towel on top of the comforter where your dog typically lies can also reduce how much makes it into your sheets.