the ongoing tail

The kitten spent the night in my garage, dry, warm & fed. It was starving for attention this morning. I'm racked with multi-pronged guilt. The kitten is living at the school. The kitten has a little pink collar. The kitten is either lost or left to its own devices. The kitten is missed by the collar-buyer or not. The guilt will be for any decision - I'm either stealing a cat or failing to steal a cat. What to do....