While every dog is different and may have allergies to certain foods, like people, there are many fruits and vegetables you can try that are extremely healthy for them and enjoyable to them. A few times per week I alternate between snacks. I give my adults boiled or steamed acorn squash or butternut squash, sweet potato, broccoli, green beans, zucchini, asparagus or carrots. I also give them fresh blueberries, raspberries, small pieces of banana and tiny pieces of pealed apple. With the high content of sugar in sweet potato, blueberries, raspberries, carrots, banana and apples, I limit the frequency to 2-3 times per week for those. The boiled or steamed vegetables, I also put on top of, or mix into their kibble. This makes their kibble taste better and gives them added nutrition on a regular basis. Scrambled eggs and low fat, low sodium cheeses, such as low fat mozzarella, I also limit to 2-3 times per week. If your budget and schedule allow human grade food daily, that is a bonus for long term health and well being.