While bananas are safe for Rottweilers to eat, they should be given in moderation. A few small slices of banana per day can be a healthy and tasty treat for your Rottweiler, but too much banana can lead to digestive issues or weight gain. It is important to monitor your Rottweiler's intake of bananas and other fruits, and to consult with a veterinarian if you have any concerns about their diet.