Yeah, we no longer use tennis balls with Sugar. We bought several Kongs in several sizes and we use those now. She loves to chase them. She gets super amped when we take one outside.Maia's Dad said:Maia has the same kong as well- if you throw them, they bounce all over the place, really unpredictably (because of the shape, I s'pose). Maia really loves that, trying to figure out which way it'll bounce and trying to catch it!