Thru galleys (also known as "downline catering") happen at almost every outstation. Specifically, alcohol will only be boarded at hubs, long haul international destinations, and a few domestic outstations. At some stations, fresh food will be replenished, but the snack cart will not be (they're boarded separately). As you board the aircraft, take a moment to look into the front galley. One of the atlas carriers should have a yellow tag on it - that's the coffee carrier, and that only gets changed out when the alcohol does. The yellow tag is there to remind the downline caterers to leave it alone.
For most flights, there's rarely an issue. But if the inbound flight had a lot of drinkers, the out bound may end up suffering. Same for eaters.
Originally Posted by
Often1
Ice is always available and it is more than likely that if ice ran out, that the forward FA who should have grabbed it off the jet bridge, failed to do so. Again, sloppiness.
That is not the policy for UAL mainline operations (I won't claim to know UAX rules, though). Ice is delivered to the a/c by ground staff.