I would be careful as to how much you gave them, since too much dried fruit can cause diarrhea. It really depends on how thick the slices are, and how big the sweet potatoes are-just use your best judgement. If they get upset tummies, don't give them any for a few days, and give less in the future.
I bet they'd also like dried apples, bananas, carrot slices, zucchini slices, strawberries, peaches-as long as you remove the peel and seeds from fruit. Vegetable peels are usually ok. As a reminder, don't give any onions, garlic, grapes, raisins, or chocolate, as they are toxic to dogs.
I give my two a whole organic carrot for chewing-they chew it just like they would a bone, and I'm sure it's good for their teeth. Just an idea for you
