1 Samuel 23 - was Keilah besieged?

[Eoghan]

Close reading of the text suggests that Keilah was beseiged by Philistines who were settling in for a long term starving of the city. This would explain the provisions they brought with them. These provisions (flocks) are described as theirs and taken as booty. Surely David would have returned any flocks stolen from the Jews?

Please read the text carefully to see why I assume this seige.