Hey Ashes,
Try this tread for the phero/depression connection: Pheromones to Treat Depression, Futurist, and alot of the other posters in this thread, are some of the most knowledgable people that we have ever had on this forum.
This is one of the realated threads listed at the bottom of the page. You can also click on the tags in the lower left. Could even do it the old fashioned way, and enter terms in the search box at the top. This forum has been around long enough that you can find disscussions on almost any subject. (I haven’t tried a search for penguins yet)
As to your diet question, River’s New phero diet plan? thread is probably one of the best.