My son was refilling Alfie’s food containers and drew my attention to a slash down one of the food bags in the garage which must have caught on something sharp when it was replaced after the last refilling. It’s the Arden Grange kibble he gets. There’s about half a 6kg bag left – it feels and looks OK but wondering if it’s advisable/not advisable to use since it’s been exposed to the air for a few weeks?