Why carrots are a popular training treat
Carrots are a favourite with trainers for good reason: they're low in calories, easy to portion into small pieces, and have enough crunch that most dogs find them satisfying to eat rather than just swallowing them whole.
Raw carrot also gives some mild dental benefit through the chewing action, and frozen carrot sticks are a common (vet-approved) way to soothe a teething puppy's gums — just supervise to make sure they're gnawing, not swallowing large chunks.
Because they're inexpensive and easy to prep in bulk, carrots are also a practical choice for owners doing frequent short training sessions through the day, where a higher-value treat would add up in cost and calories much faster. Just introduce them gradually alongside your dog's usual diet, as with any new food, and watch for the first few servings.