They certainly at times during the breeding season fight desperately among themselves.

Cougars are very solitary beasts; it is rare to see more than one at a time, and then only a mother and young, or a mated male and female.

While she has kittens, the mother is doubly destructive to game.

The young begin to kill for themselves very early.
The first fall, after they are born, they attack large game, and from ignorance are bolder in making their attacks than their parents; but they are clumsy and often let the prey escape.

Like all cats, cougars are comparatively easy to trap, much more so than beasts of the dog kind, such as the fox and wolf.
They are silent animals; but old hunters say that at mating time the males call loudly, while the females have a very distinct answer.