Good deeds

When I was a little boy, the priest in the catechism lessons admonished us to remember
to do good deeds. We should have done at least one a day. I wonder if feeding the flies
I caught to the two spiders residing in my bathroom counts as such—double, actually,
if you look at it economically. I guess it should, at least from the spider’s perspective.
But before you accuse me of mockery, we should love every creature, should we not?
And is a spider not also your god’s creation? Since I cannot stand flies, it is only natural
to support their predators. As they say, an enemy of your enemy is your friend, and you
should always take care of friends and family. And do not give me that look. I know I am
supposed to love my enemies, but since I am no longer a believer, well, I can always ask,
Why are spiders not vegetarians then? Or, even more, why is feeding required in the first
place? After all, even plants are living creatures.