To Ripen a Rawhide

IV has this new deal with her rawhide bones. I will give her a new one. She will carry it around with her for days. DAYS people. Without chewing on it at all. She will carry it to the door, where I make her put it down before she goes outside, then she will pick it up as soon as she get's back inside, and she'll put it down beside wherever she lays down.

Then one day she'll just start chewing it.
And then it is gone.

I can only imagine that she is waiting for it to ripen.

Otherwise I am at a loss.