Silvanus explained how important it is not only to hide out of sight, but also out of scent range. Concealing scent is much more difficult than finding a good hiding spot, but it could be the difference between life and death.
Eos dropped a very nervous squirrel to the ground and ordered keep to chase it. She regretted this idea when the squirrel climbed onto keep and the chase required the rest of the class to participate.