Thank you!
We're really sorry we didn't have enough time, but we are going to continue developing
That is actually not a bug, it is intended..
Due to not having enough time we did get to clarify one of the main mechanics. Both dogs are afraid of something, Darwin doesn't like water and Roy is afraid of the dark. The pond is one of the puzzles involving one of their fears
(I'll make sure to add that clarification on the game page)