So if someone removed the ant infestation in your house you would call it stealing?
Oh and BTW, feral means escaped/released domestic animals that have started a population in the wild,
if a stray dog wanders on to your property, does that make it yours?
No, I'd call that tresspassing, which...
if I try to take DOMESTIC eggs from a lake (That doesn't even want them!) its illegal?
Yes, it's called "stealing"
ASK permission and if they say yes, it will be legal