Rick, does the area you were hunting have the type of soil that allows the water to bore subsurface tunnels with just a few inches of dirt over the tunnels? One of the places I’ve hunted in Colorado has soil like that and you have to really watch your step, otherwise you can drop into a big hole underneath.
Maybe get someone to help and search the area where you last saw her, looking for hidden holes.

Praying for the best.

NRA Life,Endowment,Patron or Benefactor since '72.