Yeah those reubber toys you stuff treats in are called kongs & if he is getting his treats out easily try stuffing it with other goodies. Almost anything can be used.. use you imagination.

For example things I stuff ine with, can be combined or can be used alone (leftovers are great for this):
meat & potatoes
fruit & yougurt
cereal w/ yougurt
thick canned dog food w/ pieces of dog food
peanut butter
cream cheese
macaroni & cheese

you can freeze or serve them room temp, whatever you feel is right. The frozen ones tend to last longer.

Sometimes I visit garage sales & pick up kids toys as my dogs are pretty destructive.
They make buster cubes & things of the sorts where you fill it w/ regular dog kibble or you can even use cereal.


Just a warning about adding another dog. Yes they can play together and probably will but not enough to get out all that energy. Most dogs need some incentive (you) to play. So most likely you will end up with 2 dogs that have tons of energy.

Can you afford & handle double the dog food, double the vet bills, double the cleaning & grooming? I am not trying to talk you out of another dog by no means just I want to make sure you are prepared for what may happen.
I always say if you don't have time for one dog how can you have time for 2?
It may help, you never know they may play all that energy out without you having to excersize them if yoiu have a very large fenced yard or something but you may also end up with just double the trouble.

If you divide the exersize time (say if you ussually excersize him once a day for a half hour) try two times a day for 15 minutes. Most dogs require at least an hour of vigorous play time.

What breed of dog do you have? How old is it?
Have you tried obedience training or agility oir flyball?
Also by doing the nothing for life is free training method it may help quite a bit. If you do not know what that is let me know I'll explain it.