The Larger the Worthier?

A reply to a Buddhist friend, who chose to get pest control to exterminate lice-like insects that plagued her house, which bit her family members badly too. They were traced to being centred on baby birds hidden in a pipe…

Very often, struggle as we might to see all sentient beings as equal, we still need to make hard decisions at times when caught in a dilemma? Most of us see lifeforms with bigger forms as more precious. E.g. humans are more precious than birds, who are more precious than the lice. I don’t know if it is too late, but how about scooping to remove the insects elsewhere, dismantling the pipe to rescue the birds? Not easy, but worth it?

The incident reminds me of this touching incident:
http://mpbvf.wordpress.com/2007/01/31/teachings-asanga-maitreya-a-female-dog-and-the-maggots/