Donna trills softly as a friendly request to be let outside into the garden.
In this video clip the domestic cat Kompis greets me with a soft trill or chirrup by the kitchen window. I think he knows that I usually open the window and give him a small treat when I hear his friendly trills.
Vimsan is in heat and trills softly.
The domestic cat Donna squeaks, trills and purrs simultaneously when she wants to cuddle.
The domestic cat Turbo meows and then trills (grunts) softly and friendly to solicit a treat.
Turbo often grunts or murmurs softly when I pet him while he sleeps.
Donna uses meows, trills and trill-meows to encourage me to follow her to the door, so that I can let her out into the garden.