POLICE PROBE ENTRY CASESTwo cases involving the entry of business places in the city today were under Investigation by city police.Roy Purdy, of the Chesapeake Seafood Company, Dock street reported that someone had re* moved a screen and broken ft window of a chicken house In be.ck of the main seafood building. He said the chicken house had ■ been entered but that nothing1! had been taken. No attempt was made to enter the main building.The door of the Stokes' Grocery, 206 Main street, was found open ; at 7:30 A. M, yesterday, after having been locked the night before. Police were told that apparently nothing had been stolen. The store door was locked at 6 ! P. M, Tuesday when it was closed for the night. It was found locked I by police at 3 A, M, Wednesday when they made a rountine cftedt of business houses on the street.