If you scroll down on this page you can see a photo of Balto's team mates at a dime a look in LA.
http://www.sideshowworld.com/81-SSPAlbumcover/Sam/1-Balto/Mary.html

If you go to this post on the forum, and look at pictures #'s 7 through 10, you will see members of Balto's team. Only Balto and Fox are specifically identified (the others are not generally known by anyone as far as I know, nor identified by name in any of the pictures). Fox is the white dog with the patchy markings and black head. Balto should be obvious - he's the nearly all-black dog.


http://www.animationsource.org/board/post1264003.html#p1264003

These two separate questions have probably already been asked about a billion times on the site, and in this questions section (it helps to search first), but I don't mind answering again, because it's a topic that is near and dear to me.

The known seven (of thirteen) include: Balto, Fox, Tillie, Billy, Sye, Old Moctoc (sometimes known just as "Moctoc"), and Alaska Slim.

As to what they LOOKED like, well, both I and MightyBalto1925 have photos we can add...I will do so in a follow-up comment, and ask Mighty to as well.