send the/(one's) feelers out
To try to learn about or discern something through tentative, discreet, or indirect discovery. An allusion to the antennae of insects, used to detect minute changes in the environment. He sent feelers out for the past couple weeks to see how employees might react to such a policy. We are sending our feelers out for talented young lawyers who would make a great addition to our firm. I suggest sending the feelers out for a while—you never know when a great job opportunity might present itself.