If you only have one dog and cant wait untill you go on ur next.
Well here is the answer
Go for a walk with your dogs and go to the park.
put somethiing on your dog like a hat and exit.
It will say saving.
Once it saves turn your DS off.
Turn the power back on.
Go to 'go for a walk' and u will be able to go for millions of walks in 30 minutes!!!!