How do you make mountain lions happy on zoo tycoon complete collection

Alot of people are complaining that their mountain lions are never happy. ( i care about mountain lions and i love animals so whoever doesnt like this question dont look at it :P
1. they love alot of rocks. keep on adding rocks even though they make frowny faces until the zoo keeper says theres too many.
2. they like brown stone, gray stone, grass, water and a minicule amount of snow.
3. they like alot of hills and tiny cliffs
4. make sure they have a huge_ exibit.

hope this helped people who were looking for this answer :>