Well, I'm pretty sure that the dark grey comes from the use of the benetropic water (Whatever that is) which seems to change the chemical balance of the body. The change in colour obiously comes with a change in other properties as well. It seems that production of/reaction to pheromones would be one of them.
Since Erin does not use the benetropic water in caring for Lilan, she would therefore be unaffected.
The whole bloodlust thing, well, it's been known to happen to humans as well, and we can't even pin down the threshhold where it happens then, so why should we be able to figure it out for a wolf/eagle/cat/whatever? Or, for that matter, some lizards who have obviously never been introduced to cube-square law.