Last fall I shortened my three year old cockbird's spurs because they were starting to get in his way while walking. Two people involved; I held him, another (stronger!) person trimmed them back far enough to get out of his way, and then filed the ends smooth.
Not into blood, no problem.
Mary
Is he having a problem with the aspirin? Tummy ache? Maybe try no aspirin and see.
I've got a two year old Chantecler who looks like spur removal is in his future. This isn't cheering me up! Mary