@etzbseder:
While I've got people looking at this, my B also has a minor umbilical hernia, I was wondering, how big of an issue is it, and should I get him fixed. Do the potential problems get overweighed by the benefits?
That is usually not a big deal. The majority of Basenjis are born with umbilical hernias.
Should you get him fixed? As in neutered? Yes. Should you get the hernia fixed? They could do it when they neuter him if it bothers you…but it isn't a health concern unless it is quite big.