Awww... Well done on training your owner so well Dusty
We're actually quite cruel and while we make sure Scamp's treats are all stuff she can drag through tubes, we may have spent about 15 minutes one night laughing as she tried to get a walnut up a specific tube lol (I even threatened to film it but was laughing too much to hold the camera steady.)
She got it up fine in the end, then dropped it instead of getting it around a corner so had to try again, then kept having another go e.t.c and this lasted for ages. That ham is nothing if not stubborn, but in the end I made more holes in it so she could get a better grip lol
Scamp gets everything else she could want, but that one we're mean with sometimes lol