To listen for bowel sounds on a dog, place your stethoscope (or your ear) against the abdomen just behind the last rib on either side of the body. The most productive area runs along the flank, from just behind the ribcage to the soft belly wall ahead of the hind legs. This region sits directly over the stomach, small intestine, and large intestine, where the muscular contractions that move food through the gut produce audible gurgling, bubbling, and rumbling sounds known as borborygmi.
Anatomy of the Listening Area
A dog’s abdominal organs are not evenly distributed, so where you place the stethoscope matters. The stomach sits high and slightly left of center, tucked just behind the last few ribs. The small intestine fills most of the mid-abdomen, and the large intestine curves along the outer edges. For a general check, start on the left flank about two finger-widths behind the last rib and listen for 30 to 60 seconds before moving to the right side and repeating.
You want to cover at least two to four spots across the abdomen. A simple approach is to divide each side into an upper zone (closer to the spine) and a lower zone (closer to the belly midline). Sounds can vary between these areas because different segments of the gut are contracting at different times. Spending at least 15 to 20 seconds at each spot gives you a better picture than a quick pass.
Positioning Your Dog
A standing position works well for abdominal listening and is often the easiest to manage at home. Research comparing standing and right lateral (lying on the right side) positioning for abdominal assessment in dogs found excellent agreement between the two approaches, meaning you get reliable information either way. If your dog is calm enough to lie on their right side, that can relax the abdominal wall and make sounds easier to pick up. But if your dog resists being placed on the ground, standing is perfectly valid. The key is a quiet room and a still dog. Turn off the TV, wait for the dog to settle, and avoid rustling clothing or fur against the stethoscope head.
What Equipment to Use
Any basic stethoscope will work. Bowel sounds are relatively low-frequency rumbles and gurgles. The bell side of a stethoscope (the smaller, open cup) is generally better at capturing low-frequency sounds compared to the flat diaphragm side, which favors higher-pitched tones. If your stethoscope has a dual head, try the bell first and press it lightly against the skin. Pressing too hard can stretch the skin into a makeshift diaphragm and actually filter out the low sounds you’re trying to hear.
If you don’t have a stethoscope, you can press your ear directly against your dog’s flank. You’ll hear less detail, but loud borborygmi are often audible this way, and sometimes you can even hear pronounced gut sounds from across the room without any contact at all.
What Normal Sounds Like
A healthy dog’s gut produces soft, intermittent gurgling every few seconds. These sounds come from peristalsis, the wave-like muscle contractions that push food and gas through the digestive tract. You should hear gentle bubbling or quiet rumbles that come and go. They’re often more noticeable shortly after a meal, when digestion is most active, and quieter (but still present) between meals.
Veterinary professionals categorize gut sounds as normoactive, hypoactive, or hyperactive. There is no universally agreed-upon number of sounds per minute that defines each category. The assessment is inherently subjective, even among trained clinicians. What matters most is context: what sounds like “normal” for your dog at rest after a meal may differ from what you hear on an empty stomach. Listening a few times when your dog is healthy gives you a personal baseline to compare against when something seems off.
Signs That Something Is Wrong
Hyperactive bowel sounds are loud, frequent, and almost continuous. They often accompany diarrhea, dietary indiscretion (eating something they shouldn’t have), or early gastrointestinal upset. The gut is essentially working overtime, and you’ll hear it clearly.
Hypoactive or absent bowel sounds are more concerning. Complete silence over 60 seconds of careful listening on both sides of the abdomen can suggest the gut has slowed or stopped moving. This happens with certain obstructions, post-surgical complications, or serious illness. If you combine that silence with signs like vomiting, a bloated or tense abdomen, restlessness, or drooling, the situation may be urgent.
One specific pattern worth knowing: if you gently tap the swollen area just behind the last rib and hear a hollow, drum-like sound, this can indicate a gas-filled stomach. In large and deep-chested breeds especially, a taut, distended abdomen that sounds like a drum when tapped is a hallmark of gastric dilatation-volvulus (GDV), commonly called bloat. GDV is a life-threatening emergency that requires immediate veterinary care.
Tips for Listening at Home
- Time it right. Listening 30 to 60 minutes after a meal gives you the most active sounds to evaluate. An empty stomach naturally produces fewer sounds.
- Part the fur. Thick coats create noise artifacts. Push the hair aside so the stethoscope or your ear contacts skin directly.
- Stay still. Movement from either you or the dog generates friction sounds that mask gut activity. Have someone gently hold your dog or offer a treat to keep them calm.
- Listen to both sides. The left flank gives you better access to the stomach and descending colon. The right side brings you closer to the duodenum (the first section of the small intestine) and ascending colon. Checking both gives a fuller picture.
- Build a baseline. Practice on your healthy dog a few times so you know what their normal sounds like. That way, a sudden change in volume, frequency, or total silence will stand out immediately.