Dark And Cool
It doesn’t sound likely that the mother fox would purposely put her babies in a sewer grate. But, animal experts can understand why she might have done so. Fox dens tend to be dark and cool, not unlike the sewer grate that the babies ended up in.
Mistake
The mother fox might have made a mistake by leaving her babies behind while picking her den. Despite the fact that the sewer was dark and cool, its similarities to typical fox dens weren’t enough to make it a good place for the cubs to be.