Why does gloss paint dry in nano seconds on a dog and yet take 24 hours to dry on a door frame?

Also, why when there is a wide open door to go through does a dog have to slide through rubbing up against the allegedly touch dry recently painted frame? :rolleyes:
More to the point, what can I use to get gloss paint safely off a short coated breed? (White spirit is probably a bit harsh!!)
Off now to check the breed standard for the GSP to see whether the permitted colours include patching with Dulux biscotti.