It’s behaviour observed in most dogs – and frequently, owners leap to incorrect assumptions about its significance. However, veterinarian Nicole Rous has explained exactly why dogs eat grass – and when it’s something to worry about.
In a TikTok video, Nicole, who posts online as @drnicolerous.vet, outlined four typical explanations for why your dog might indulge in a snack while outside in the garden, saying: “Ever wondered why dogs munch on grass? You’re not alone, here are some insightful reasons behind this common behaviour.” The initial explanation, she noted, is boredom or curiosity, saying: “Dogs are naturally curious creatures, and sometimes they investigate their environment by nibbling on what’s around them.”
Subsequently, she proposed it might be connected to their ancestral behaviour. “This may stem from their ancestors, who consumed plant matter as part of their diet, potentially in search of extra fibre,” she explained.
Nevertheless, the two explanations that tend to cause owners the greatest anxiety are an upset stomach and nutritional deficiencies. “One reason that concerns many pet owners is that some dogs eat grass to soothe an upset tummy or to induce vomiting,” she said. “If your dog frequently eats grass and seems uncomfortable, it’s important to consult your veterinarian.”
She additionally highlighted that dogs may consume grass – or even soil – while seeking trace minerals they might be missing from their diet. Offering her general guidance, Nicole concluded: “If your furry friend only occasionally nibbles on grass and is otherwise healthy, there’s usually no need to worry. But if grass-eating becomes a frequent habit, a chat with your vet is a wise step.”
Responding to her post, one user revealed: “My GSD (German shepherd) eats grass as part of a routine when swimming in the pool. She does some laps in the pool, then a lap around it, and as she goes past she grabs strands of grass through the fence. So odd.”
Another user shared: “My five-year-old Jack Russell eats grass occasionally, and it’s usually to soothe his tummy as he has inflammatory bowel disease. It worries me because I know when he eats grass, it means he’s having a mini flare-up and must be feeling off-colour.”
A third user revealed: “My dog just loved the taste. He only ate buffalo grass! He was never sick, had a great balanced diet, and his blood work was always really good. He was just odd.”
One more user suggested: “I’m pretty sure my dogs eat grass as a social behaviour. If I’m outside playing with grass, they come over and start eating it too.”
A final user explained: “My almost two-year-old mini Groodle eats grass a lot. I try to feed her fresh food – meat, veggies and fruit – but she’s very fussy and won’t eat much, not even carrot sticks, bananas or celery.”