yes they are brazed with brass, and no heat is not a good way to take them off.
1 leave them on, it will save a puppies life, and there is no reason to remove them.
2 if you must remove them get a mini hack saw and aim for the top of the brass, or bottom of the guide depending on how thick the brass is, carefully saw through, then get a file, and work down the brass, then finish it off with some sand paper and emery cloth.
STOP! put the torch down!
yes they are brazed with brass, and no heat is not a good way to take them off.
1 leave them on, it will save a puppies life, and there is no reason to remove them.
2 if you must remove them get a mini hack saw and aim for the top of the brass, or bottom of the guide depending on how thick the brass is, carefully saw through, then get a file, and work down the brass, then finish it off with some sand paper and emery cloth.