My goodness me it keeps her busy.
The poor old kongs were getting a battering so I thought I'd try your foraging tip. Brilliant. She's still out there now 20 mins on. I'm also amused by her repeat goings out to check if by any freakish chance she has missed a bit.
I'm only doing this for her kibble meals though. The thought of sprinkling raw mince on the grass is a step too far