Verdict: No, dangerous
Sausage is generally dangerous for dogs due to its high fat content, which can lead to pancreatitis, and high sodium levels. Many sausages also contain seasonings like garlic and onion powder, which are toxic to dogs and can cause red blood cell damage.
Thiosulphates in garlic and onion cause oxidative damage to red blood cells, leading to hemolysis. High fat content can overstimulate the pancreas, causing inflammation (pancreatitis). High sodium can lead to hypernatremia and dehydration.
Garlic, Onion (thiosulphates), High Fat, High Sodium