Room smells like marijuana or hashish

Rastatoullie possibly and grass instead of hay butter? sorry for the off topic, but the topic is such a perfect opportunity. Seriously, I can understand you. I know very well what grass smells like and can imagine that the smell in your own home is very strange.

Which animal in the wall is supposed to smell very strongly of grass? Snoop Dogg?

The whitethroat, the weed-eater, or the intoxication swallow would still be possible.