Tigris in the litter box:

Mreeawww (means: This is hard work!!!)

After that:

Meeee awwww! (Clean it slave!)

Meeaww (tenderly) (Just a little food please).

Tigris too talks more with each year. Filou talks less but sometimes you can hear him in the staircase:

Meew.......Mew.........Meew....

Means: I'm lost in the wood, gimme a signal