In the seattle area I find shrooms growing everywhere during the season if I am looking hard, like along the side walk, in the park or any high school and college campus. I've never ever seen shrooms growing out of cow shit... well, soil is i guess technically.. but nothing fresh. Theres mostly cyanescens, stunzii and cubensis (and supposedly azurescens) growing here (as far as the magic ones), not sure if they grow wild or if hippies have planted them all over, but they always seem to grow out of the same wood chipy soil often with noticable mycelium (white splotches, fungus roots) so thats often a dead give away of places to look really hard for shroom caps.