Written by Troll Berserker :

A lot of people here like making characters who are pups of Aleu and Niju, Kodi and Dusty etc. Those pairings are NOT canon. It is possible but it must be explained somehow how the two became mates/had pups (either with an explanation in the bio or link to a fanfiction). Non explained pairing kids will be seen as AU and will not be allowed.

You can ship whoever you want, but following the "DO NOT change the events that happened in an explicit way in the movies" as written in the rules, instead of writing "he's the son of Jenna and Kaltag" like it was something obvious, just include a short explanation like "Jenna broke up with Balto and became mates with Kaltag". That's perfectly enough.

The only official Balto pairings are Balto and Jenna, Boris and Stella and Ralph and Dusty (yes, it's canon and confirmed. Check the interviews with Balto 3 director).

I'd also like to remind you that character rules are more important than character tags. even if there is "not Balto related" tag, it is outdated and unrelated characters are not allowed anymore.