I just learned a new tool to use with the pliers for this; foil covered baked potato (hot) to stick on the spur (but not the poor leg) for a few minutes before using the pliers to reduce any bleeding from pulling off the spur. Maybe keep a potato handy with some foil to cover it with after...
Not sure if this qualifies for an emergency kit, but I keep pinless peepers and peeper pliers on hand for my birds in case one of them starts feather picking, as it can lead to wounding or killing once they see blood. It's more preventative than emergency, but I just remembered how important it...
What about liquid bandage? I've used it a number of times now, no harmful effect noted, any reason it shouldn't be used? Hate to hurt the birdies when I'm only trying to help, and I keep forgetting to buy the blue kote