I'm at a barn where in 4 years, nothing has ever been missing. Ever. I dropped my fly spray bottle one time and 2 days later it was right where I dropped it.
So I get this hoof supplement, and have the container behind my grooming tools on the ground under my saddle. It just "poof" disappeared! I thought maybe someone knocked it over and threw it away. But, no, it's gone.
So I'm getting some new stuff, and I'll be keeping it in a plain container- and filling the supplement container with some nice chicken feed. I will be laughing if it disappears. Then I'll get nasty.