First I would like to state that this is not a call to arms. I find it abhorrent to pressure another animal to change it's habits, be that a homo sapien or a cat: this does not however apply to the instinctive action to stem force in an act of self preservation.
The problem with the notion of action is that I started with the idea that being vegan is the avoidance of using animal products, i.e. it is a negative use of animals not a positive use of animals and|or vegetables. I'm sure plants would rather be left to grow not be stemmed or bred for consumption.
For being vegan to become a positive act there has to be some creative ability with the notion of an outcome that benefits the actor. The self righteous self labelling that I am a better person by not doing harm to animals really doesn't stack up.
This benefit is as illusive as trying to avoid avoidance.
That life exists as an immortal concept, thus requiring no sustenance, show the degree of sustainability that each intelligent being must perform. A far cry from the vegan who's concern it how better to consume plants rather than animals. Better for some!