The quick answer: Not recommended. If a dog eats this tart, citrus fruit, especially the peel or plant material, he can experience an upset tummy or worse.
Benefits of limes
Limes are chock full of vitamin C which is a powerful antioxidant that can help boost the immune system, increase iron absorption, and promote healthy skin. Additionally, lime juice is said to have antibacterial and antifungal properties. Limes are a very versatile fruit and just about all parts of a lime are used, including the fruit, juice, peel, and zest.
Though these benefits are applicable to humans, the same does not apply to our pets. When feeding a complete and balanced dog food, your dog will get all the nutrients he needs and does not need to rely on added fruits and vegetables to get his nutrients. However, many dogs enjoy eating safe fruits and vegetables, so if you want to share with your dog, opt for something he will find more palatable, such as apples, carrots, or oranges.
Eating large amounts of limes can cause serious issues for your dog, especially the peel which contains essential oils. Along with digestive upset, vomiting, and diarrhea, consuming large amounts of essential oils via lime peels can lead to poisoning. Symptoms include lethargy, sensitivity to light, low blood pressure, loss of coordination and liver failure. Seek immediate veterinary care if you suspect your dog has eaten lime peels or large amounts of the fruit.
In addition to toxicity, lime peels and seeds pose a choking hazard as well as the threat of an internal blockage. Though most dogs won’t seek out limes due to their sour taste, it’s best to keep limes and their remains well out of reach of curious dogs.