Wilfred is not in Ryans head.
Sneakers, the dog knew kristen was the one who led to him drowning.
The Milk going rotten,
Theese are things ryan could not have known
Wilfred calls bruce a snake on more then one ocasion{the devil in the garden of eden, was a snake the animalifcation of temptation.
Tobin bell at the end says hes on medication, could that medication just be blocking his real visions, by blocking the way the brain processes information,
most likely theese medications are antipsychotics,
During one of his dreams/visions ryan saw a bunch of pictures on the walll similar to how police forces work investigations, there was a picture of adam, with an X through it,someone he would not have known{i have three episodes left of the aussie version, and to becompletely honest besides the lack of censorship on the aussie version, and the cop out explaination, i think i like the american version better, which ususally isn't the case for most foreign films and television adapted to american screens.
Hopefully they do continue with a movie, or netflix continues it, and pulls a fast one on us and cleverly explain why wilfred wanted ryan to think he was insane,
also jenna is a horrible person, and has no real reason to be with drew,