#5 Tail Movements
Happy dogs wag their tails in way they move their body. If he is sitting and relaxed, his tail will be relaxed.
The irregularities come in tail when they sniff any new situation or feeling aggressive.
#6 Tail Carriage
A happy dog carries his tail in relaxed form. Tail carriages are varying from breed to breed. Each dog has different tail carriages positions.
But if they are carrying their tail to high, this means there is something aggressive and a tail pinned down meant they are feeling scared.
#7 Behavior
Chewing is a normal behavior of dogs and their mouth is invaluable asset for them to explore environment. But excessive chewing means stress.
Happy dogs have mental stimulation which prevents them to do any destruction. By destructive behavior they are telling about unhappiness and boredom.