That is either a blackberry or Dewberry. the Dewberry's have smaller thorns, almost fuzzy looking, than the blackberries and the thorns are reddish. Blackberries will grow more erect than dewberries. If you have a place to let them grow do it! They make great jelly!
I should be getting my first batch of chicks tomorrow or Wednesday! The ad says 2-10 day old chicks. I am planning on using a Rubbermaid brooder. I have looked over a good bit of info here but any last minute advice ya'll might would be helpful.