There have been rumors of the character Dusty haveing wolf in her even throw her charater page says she is dog. Maybe Dusty does have wolf in her and   here someway to tell. All of these pics of from movie 3    are ways to tell 

       If Dusty does have wolf   in her here are the wolf genes
 Jenna has all dog genes so her paws are small because she is also female, but if you look at Dusty;s paws they are a bit bigger. It may not be a good idea to look at thw wolves in Balto 2 but in it I notice all the wolves had the the same paws shapes including the girls. Since it seens that the boy dogs have bigger paws than the grils Dusty's paws could be wolf paws.

Jenna and Dusty have dog resenbalens, but there neks aren't exaclty alike

Dusty's fur pattern is kind of like Aleu's fur pattern. Aleu does have a wolf fur patteren because Niju the wolf had the same as Aleu's

That is all I have to right. It is really a person's opion to f Dusty is a dog or has wolf. It is also a cartoon so it can really be what every the animators make it. In real life throw usty really could have wolf in her if she lives in reality.