1. Start feeding your dogs from a rubber stuffed chew toy such as a kong or similar product which you can fill will kibble, peanut butter, raw food (if your dogs on raw, stuff a RMB in there and keep them busy for longer), you can freeze them which takes much longer for your dog to eat. Be creative, chewing provides excellent mental stimulation and provide endorphins!
2. A short obedience training session each day not only increases their obedience but also tires them out!
3. Play hide and seek with them, tell them too stay on their bed, you go hide somewhere easy at first and tell them to come find you, slowly hide in more difficult places! Sniffing tires dogs out too! You can even hide food for them to find!