Plain canned pumpkin (not pumpkin pie filling) can be a healthy snack option for dogs. It's a good source of fiber and can help with digestive health.
Boiled or grilled chicken without seasoning or spices can make a tasty and protein-rich snack for your dog.
Slice sweet potatoes into thin strips and bake them in the oven until they become chewy. They make a great alternative to commercial dog treats.
Cooked salmon or canned sardines (in water, not oil or with added salt) can provide healthy omega-3 fatty acids and be a tasty treat for your Rottweiler.