I
always use one of those lit magnifying lenses to show up the faint red
line of the blood vessel. I firmly hold the foot and toe that is going
to be trimmed. I cut well below the end of the blood vessel and work my
way up.
I use convex toenail clippers
on the birds, it seems easier to see what I am doing. I always have an
open jar of Kwik stop (stypic powder) open when I work.