Physical, or mechanical, defenses are barriers or structures designed to deter herbivores or reduce intake rates, lowering overall herbivory.

This slows the process of eating and reduces intake.

A reduced intake of two-year-olds has seen the stable shed 100 horses from a string that swelled to more than 350 last year.

Reducing intake of poorly absorbed sugar alcohols may be of benefit.

Significantly reduced intake of fish, as it became more profitable to export, rather than inside the country.