What about reversing the label? Treat animal products like you treat allergens. Many restaurants have a table of allergens, they usually include things like "e

What about reversing the label? Treat animal products like you treat allergens. Many restaurants have a table of allergens, they usually include things like "eggs", "milk" and "fish", just add an "animal products" line, maybe also more specifically "meat" (for vegetarians) and "pork" (for religious reasons).