[When Fugo does things, he never does them by halves. He meticulously examines her hair, working from left to right, always careful not to scratch her scalp with his claws.]

It definitely isn't bugs. I didn't see any signs of insect activity. [He pauses--] Sorry. I'm not trying to gross you out, just ease your mind.

[He combs down the hair on the back of her neck. He rubs a piece between his forefinger and thumb, examining it for anything that might come out or off of the hair. He finds nothing, of course. Trish's hair, as always, is very clean. It smells of the shampoo she likes to use and her perfume.]

It isn't dye or paint either. Given that you've washed it, we should be able to see some transfer at this point. As strange as it is, the best way to describe this is that your hair itself changed color.

Usually ... [Fugo trails off. Hm. It would ... probably upset Trish if he just bluntly said "your nightly transformation might include complete hair loss and regrowth". So he won't say that.] Well, nevermind. The speckle pattern reminds me of your fur. So it's safe to assume that this has something to do with your transformation.