Yup, those are chickens! You've got 2 silver laced wyandottes on the left, a black australorp in the middle. Someone else might be able to help you with the other 2. The one standing could be a buff orp or a rhode island red or a new hampshire red, i cant see the coloring very well. I'm not sure on the last one. Good luck!
The one standing is red, not buff, so that helps narrow it down. New Hampshire or some kind of production red. That last one has some interesting coloring around the eye, what color are her legs?