Tiny sweet peas?

[The Mama Chicken]

These are growing wild in my lower field. They look just like teeny tiny sweet peas (about the size of my smallest fingernail), but have no scent. Are they related to sweet peas? Are they toxic like sweet peas?

 

[thistlebloom]

It appears to be a vetch. If you google it you can pinpoint the exact one. I'd guess crown vetch, but there's several kinds...