Onions and Peas Planted Together

According to all of the companion plant charts that I've read, peas and onions absolutely should not be planted together.  

So I was bummed when I realized that I had planted a bunch of peas right next to where I had planted some onion starts.   Since half the peas were planted away from onions, I decided to leave them and see if onions and peas really don't get along.

The top pic is peas planted with onions. They're very happy. This pic is peas alone.  Poor sad things.  [Pics taken the very same day.]

Quite a difference.    I think it has nothing to do with the onions and plenty to do with the fact that I put lots of chicken dirt on that top bed.

We'll see about fruiting in a week or so, but so far, I think the taboo against planting peas and onions is bunk.