The best inference from the passage is:
The men had to watch the huskies closely because even if the dogs seemed blameless, they still stole and ate the bacon the men were hauling if the dogs had a chance.
This inference aligns with the description of the huskies as being capable of concealing their intentions and suggests that they could be mischievous despite appearing innocent. The mention of the men losing money on the transaction implies the dogs' propensity to take the bacon when given the opportunity.