Going by what the previous owners told us shes 18/19 months. She gets walked around dusk, and we play with her in the yard which involves a lot of her running around until she gets worn out.
She has some bones & toys that she chews on at night but wants nothing to do with kongs. She is usually sleeping or at least calm and relaxed in the evening right up until we try to go to bed. Then she starts with the jumping and biting.
We try to correct her by making her stop and calm down and distract her with chewing her bone. But then again, as soon as I try to lay down she's back at it.