Yeah i get that in this evolved species can clearly see in color, which is nice that they hinted at it as others don't. They just assume we would forget that our dogs didn't evolve that ability. Only Lyre kinda comes out and says they're able to see color when they had Lyall say, "I love red, it's my favorite color." Ugh, Lyall is by far my fave wolf/canine MC, probably fave regardless of species actually. Anyway. I don't think any tail movements are truly involuntary with canines, they just don't realize they're doing it at times, but there is always a reason. Yeah for all we know he is barking, growling etc because we're hearing the translated language in Tucker's slowly scrambling mind.