|Barking| This would be very nice, but it isn't positively needed, since we already have howls. If it is added, maybe a meow should be as well? ..Oh I can see the bark spam filled worlds now. But yes, great idea.
|Double Jump| A double jump would be very nice as well. No argument can really be placed to this.
|Trotting| Sounds nice, but meh, once again not needed.
|Ear Movement| Yes, I want ear movement. xD There is an emote named "Ear Droop" if you're looking for that however.
|Tail movement| Flicking can be for dogs too, but I like the idea of more tail movement.
|Drinking| Yup. Should be added like how it was in IT though. (In actions, you click it to lick anything/anyone.)
|Yawning| Yes.
|Shaking| Yes.
|Running Speed| Yeah, perhaps the speed, stanima, and strength bars? I'd love that so much.
|Grabbing others| I can see this as a major problem if somebody keeps grabbing somebody although they keep hitting let go.. but perhaps.
|Licking others| Should be added and used as drinking water action too.
|Mixing Markings| Sounds good.
|Falling| Sounds good too.
|Snapping| I'd love this a lot for fighting or growling.
|Stretching| Sounds nice, but then claw sheating probably must be added, along with claws..claws popping out of nowehere which you can never even have would be kind of odd.