Can Dogs Eat Pineapple? Debunking the Faeces-Eating Myth

Pineapple is safe for dogs. Let me be clear about that first. The flesh is non-toxic and nutritionally unremarkable. Where the conversation gets interesting is with the widespread myth about pineapple stopping dogs from eating faeces, which is unsupported by any real evidence.

The myth goes like this: feed your dog pineapple, and bromelain, the protease enzyme in pineapple, will pass through the digestive system and make the dog's faeces unpalatable, so the dog will stop eating their own poo. This is the type of logical-sounding explanation that spreads on the internet without anyone questioning whether it's actually true.

The problems with this theory are substantial. First, bromelain is a protein-digesting enzyme. It's designed to break down proteins in the small intestine where it can be useful. The question is whether it survives the journey through the stomach acid and intestinal environment intact enough to affect faeces consistency or palatability. The answer, based on what we know about protease enzymes and digestion, is almost certainly no. Stomach acid will denature bromelain. The enzymes won't reach the faeces in meaningful amounts.

Second, and more importantly, the coprophagia behaviour has actual medical and behavioural causes. Some dogs eat faeces because of nutritional deficiencies or malabsorption. Some eat faeces due to boredom or anxiety. Some do it during certain life stages like puppyhood when exploration behaviour is high. If you feed a dog pineapple and the coprophagia stops, the question is not "did the pineapple stop it" but rather "was there something else happening that resolved the issue at the same time?"

I've had multiple clients come to me saying they've tried feeding pineapple to stop their dogs eating faeces, and it hasn't worked. Not once has a client reported genuine success with this approach. What has worked for their dogs are things like enzyme supplements to improve digestion, stool hardeners to make faeces less appealing, management strategies to prevent access to faeces, addressing underlying anxiety or boredom, and making sure the dog's diet is actually adequate.

Pineapple is fine as an occasional fruit treat. Bruno gets small pieces of fresh pineapple maybe once a month during the season. His digestive system tolerates it without issue. It's a relatively safe choice compared to many fruits because there are no seeds to worry about, no pits, no toxic leaves, and the flesh itself is non-toxic.

The preparation matters. Use fresh pineapple only. Remove the tough outer skin and the core completely. The core is quite fibrous and can cause GI upset if consumed. Cut the flesh into small chunks. Frozen pineapple can be a nice summer treat for dogs that enjoy cold foods. Never use canned pineapple in syrup, which adds unnecessary sugar and ruins any potential nutritional benefit.

The bromelain in pineapple can cause minor mouth and tongue irritation in some sensitive dogs, so you might notice mild swelling or irritation of the gums or tongue. This resolves quickly once the pineapple is swallowed. Raw pineapple is more irritating than cooked, so if your dog has a sensitive mouth, cooked or lightly steamed pineapple is an option.

The sugar content is moderate, so pineapple is not the worst fruit option, but it's not the best either. Blueberries are a better choice nutritionally. Carrots are a better choice for teeth and digestion. You'd feed pineapple because you're eating it and want to give your dog a small piece, not because it's nutritionally valuable or has any therapeutic benefit for coprophagia.