How do you keep a dog mentally stimulated?

Skye doesn't play chess, what other ways are there

training for about 20mins-half hour everyday .. sit, paw, lie down etc even going over old things to stimulate her mind .
hide treats in toys so she has to work out how to get them out .. i used to freeze a treats in ice cubes so they had to try and figure out how to get the treat out etc .. there is also toys dog jigsaw toys etc etc from pet shops you can buy

Very cute pic why not try drafts

treat balls kongs. if you get on the floor and polay holda string or something he will chase it. hide the treats.

We hide things in an old jumper for Rocky to find, use old egg boxes to hide treats/food or a toy in too or any used cereal boxes anything like that will be great fun to tear to bits to find a small treat.

We also feed Rocky dry kibble so this can be scattered across the floor in a trail for him to find.

Training and Sports!

In my experience Lots of training in small intervals, kong with treats and above all plastic milk cartons(they were Roxy's fave things)

Training like sit, paw etc, or with Harv we have taught him to fetch certain toys, like 'green rope' so we hide them and he has to find that toy with just a verbal command, Chance is not quite as bright as harv though

http://www.amazon.co.uk/gp/product/B002WDB8AO/ref=ox_sc_act_title_2?ie=UTF8&m=A3P5ROKL5A1OLE


things like this....works great with river

pop some kibble/treats into empty toilet rolls with the ends folded shut, hide and seek with treats/toys around the room, I sometimes get him to wait and hide myself in a room and use a clicker to call him oh and I hide under duvets/blankets and he digs me out (in the right position he gives a good back massage with that one)

if Ledger is not playing ball when it comes to cleaning his paws I lay kibble on the floor and cover it with a towel and he cleans them himself then