Terry – it sounds like you’ve got a protocol that keeps odor in an airtight container and works for you.
Gina – as long as the hides are not contaminated by other odors it’s fine. You will likely want to refresh at some point but don’t overwhelm your dog with scent. They should be able to work strong scent and weak scent so you’ll want a variety of strengths.
Sue – Yes the odors do dissipate after awhile. The dogs do still work the weaker strength (or should) but be aware that too much or too little odor can be harder for dogs. There seems to be a “sweet spot” of just the right amount.
Joyride K9 Dog Training