The snow leopards interacted most often with the balls and second most often with the ropes. They hardly never interacted with the logs and seldom with the tennis balls.

The odors that they interacted most often with was cinnamon and then lavender. They did not interact much with catnip.

They interacted more often with odorized toys than with non-odorized toys.

There was no change in the animals´ activity level during baseline sessions compared to the test sessions.

The animals like to interact with loose objects that are easy to manipulate. The balls can move in unpredicatable perhaps "prey-like" ways which promote the snow leopards to perform hunting behavior. Binu had played with balls in the zoo where she was born and knew exactly how to play with them from day one of my study. Brahma was affraid of them at first but soon he also played wildly with them. 

The odor cinnamon, which they both were most interested in, has been used and found effective in other studies on felids too. These two snow leopards did not seem to be responsive to catnip.

The animals did not increase their activity during test sessions, which means that during the baseline sessions, when they did not have any objects to play with, they kept active doing something else (played with the other snow leopard or with other loose objects).

And we mustn't forget that snow leopards are cats who do exactly what they want, when they want to do it!