Every dog is different. Individual allergies and sensitivities are common — always introduce new foods in small amounts and watch for adverse reactions. This site is for informational purposes only and is not veterinary advice. Always consult your vet.
The Full Picture
While apple juice is not toxic to dogs, it is very high in sugar and offers little nutritional benefit compared to whole apples. The high sugar content can contribute to weight gain, dental problems, and digestive upset including diarrhoea. Store-bought apple juice may also contain added sugars, preservatives, or artificial sweeteners — xylitol in particular is extremely dangerous. If you want to offer your dog an apple-based treat, fresh apple slices (without seeds or core) are a far better choice. If your dog has accidentally consumed a small amount of plain apple juice, there is no cause for alarm, but it should not become a regular part of their diet.
What You Should Know
While apple juice is not outright toxic, there are important precautions to bear in mind before sharing it with your dog. Portion size matters, and certain preparations or varieties may be unsafe. If your dog has any existing health conditions, check with your vet first.