Hiss (displeasure, annoyance, pain)
Rumble (varies. One tone can be annoyance, precursor to a full-on growl. Another can be approval or a precursor to a laugh)
Chuff/puff (varies. One tone can be displeasure or to indicate tiredness. Another can be a type of quiet laughter)
Chitter/titter (varies. One tone can be nervousness or anxiety. Another can be excitement or a type of laughter)
Bay (excitement, an alarm)
Screech (pain, surprise/shock)
Yowl (pain, displeasure, anger)
Whimper (pain, fear)
Trumpet (an alarm)
Pant (tiredness, excitement, pain, fear... bunch of things)
Lol/lolling (not an actual sound, but a behaviour where the mouth opens, teeth remain mostly covered by lips, and the tongue is left relaxed. In canines, it's sometimes called 'canine laughter'. In humanoids it's silent laughter that doesn't bare teeth, as lips pulling back to expose teeth can be interpreted as a sign of aggression in animals)
If I think of more, I'll add them.
Rumble (varies. One tone can be annoyance, precursor to a full-on growl. Another can be approval or a precursor to a laugh)
Chuff/puff (varies. One tone can be displeasure or to indicate tiredness. Another can be a type of quiet laughter)
Chitter/titter (varies. One tone can be nervousness or anxiety. Another can be excitement or a type of laughter)
Bay (excitement, an alarm)
Screech (pain, surprise/shock)
Yowl (pain, displeasure, anger)
Whimper (pain, fear)
Trumpet (an alarm)
Pant (tiredness, excitement, pain, fear... bunch of things)
Lol/lolling (not an actual sound, but a behaviour where the mouth opens, teeth remain mostly covered by lips, and the tongue is left relaxed. In canines, it's sometimes called 'canine laughter'. In humanoids it's silent laughter that doesn't bare teeth, as lips pulling back to expose teeth can be interpreted as a sign of aggression in animals)
If I think of more, I'll add them.
