There's usually battles between animals, or between them and poachers, at least once per episode. These scuffles tend to be on the cartoony side, and the limited animation doesn't permit for too much violence. Bear in mind, howerver, that human villains use guns all the time (though they hardly ever land a hit on their target).
Alcohol, Drugs & Smoking
Mild
There are a couple of instances where beer can be seen on screen.
In Episode 30, "Adventure in the City", King Speckle Rex, an adult lion, gets drunk by accident. It's displayed as a comical occurrence.