Great Danes are usually very sweet dogs, despite the fact that they are so big. I don;t think there's any chance he'll become aggressive toward cats because of the cat-shaped toy. To a dog, there's no chance he'd mistake a real cat for his toy cat - and he probably won't even make the connection between the two. Real cats not only smell different, they hiss, spit and have weapons at their disposal - a.k.a. claws!

Our 3/4 Great Dane mix, dear Gracie (now at the Rainbow Bridge) was only ever intimidated by one thing - a probably 7-week-old kitten that made its way to our front stairs, and turned into a fur-raised hissing, spitting little ball of fury when I tried to take Gracie past it into the house. It would have been hysterical had our Great Dane not turned into 140 pounds of terrified jello at the sight of it, so I was stuck - I had Gracie, who wouldn't budge, by the collar, and I couldn't convince the kitten to move off its spot either. Had I let go of Gracie's collar, she would have sprinted away, so I didn't dare do that. I finally yelled loud enough for someone inside to come out and splash water at the kitten so it would run away.

Thor will probably grow up with a healthy respect for kitties, that's all!