Short answer: Yes, dogs can eat certain nuts in very small amounts, but many nuts are risky or toxic, and overall nuts are not recommended as a regular treat. Context and guidance

• Some nuts are considered safe in tiny quantities (for example, unsalted peanuts and some cashews), but they are high in fat and calories and can cause stomach upset, pancreatitis, or weight gain if given regularly. They can also be choking hazards, especially for smaller dogs.
• Other nuts are clearly unsafe or potentially dangerous for dogs, such as macadamia nuts, almonds (in larger pieces), and nuts with shells that can cause blockages or GI irritation. Some coatings (salt, spices, chocolate, xylitol in peanut butter) add additional risks.
• If a dog accidentally eats a small number of peanuts or cashews without added salt or flavorings, it may be tolerated by many dogs, but it’s still not ideal as a routine treat. Large quantities can lead to pancreatitis or GI distress.
• Always avoid nuts that are salted, flavored, roasted with oils, or part of trail mixes that include chocolate, raisins, or other toxic ingredients for dogs.

Practical tips

• Keep all nuts out of reach and do not use them as regular treats.
• If you want a nut-based treat, consider commercial dog treats formulated to be safe, or consult a veterinarian for appropriate options.
• If a dog eats a large amount of nuts or shows signs of vomiting, diarrhea, abdominal pain, lethargy, or tremors, contact a veterinarian promptly.

If you’d like, I can tailor these recommendations to your dog’s size, health status, and any known allergies, or pull up the latest veterinary guidance for your region.