Domestication has changed dogs. Once carnivores, now pets. 95% are family. Dogs are facultative carnivores. They can eat some vegetables. But there are exceptions.
Why Dogs Can or Can’t Eat Vegetables
Digestibility matters. Dogs process plant matter better than cats. But they still need animal - based diets. Some vegetables are okay. Homemade diets use them in small amounts. Toxicity is a concern.

Benefits and Dangers of Feeding Vegetables to Dogs
Vegetables have fiber. Carrots are good. Safe veggies: green beans, zucchini, cucumber, celery, bell peppers, broccoli, pumpkin. Get vet advice. Some veggies cause digestive issues. High - oxalate foods: spinach, beets, edamame. Allium plants (onions, garlic, etc.) are poisonous. Signs of poisoning: lethargy, loss of appetite, etc.

Tips for Giving Your Dog Vegetables
Vegetables as treats (10% max). Small portions. One kind at a time. Unseasoned. Cooked and cut small. Good for low - calorie diet. But main diet should be balanced.

Conclusion
Dogs can eat many veggies. Fresh, cooked, unseasoned. Small pieces. Best as occasional treats. Homemade diet? Consult vet. Vegetables add nutrition but not complete.