indelible keratin staining

From:"Dalefield, Rosalind" <>

Can anyone suggest something that will permanently stain keratin?

This is actually for keratin in the living animal; I want to mark the (light
colored) hooves of Merino sheep so I can track rate of hoof growth. But I
figured Histonetters would have some good ideas...what stains just won't
come off your fingernails!?

Thanks in advance,

Rosalind Dalefield BVSc PhD DABVT DABT
Senior Research Scientist, Toxicology
Plant Toxins Unit
5 Portarlington Rd
Private Bag 24
VIC 3220

Phone 61 3 5227 5730
Fax     61 3 5227 5555

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