The Invisibility Potion, when used on Wolfs, does not render them invisible when in water or "shaking" off water. It also shows their collar, although I do not know if that is intended or not.
MC-9158
Wolf Invisiblity Potion bug
Resolved
Duplicate
0
Andrew Dennyson
(Unassigned)
Unconfirmed
Minecraft 1.4.7
Retrieved
Duplicate of MC-464, please use the search function to see if your bug has already been submitted. Currently over 51% of tickets are being closed as duplicate.