Good, that would also get shot down because snakes naturally eat mice just like we (well, most of us) naturally eat cows. It's different from electrocuting a dog because it didn't fight as well as you wanted it to. We don't drown the cows and electrocute them before we chop them up and eat them. They get a quick bullet to the dome and it's over. On top of that, feeder mice and cows and anything else that gets eaten dies for a purpose (to be eaten, obviously) while these dogs were killed for the fuck of it. I wouldn't have such a big problem with Vick's actions if he didn't torture them instead of simply euthanizing them or blasting their domes off.
Good point on the 'snakes naturally eat mice, thing'. Seriously.
But, how you gonna say WE naturally eat cows when there's a whole nation of people that believe cows are holy AND there's a whole vegan movement/community that believes otherwise?
Secondly, how do you profess to know that cows are killed in a what you describe as a less barbaric fashion? A bullet to the head you say?
No.
The less blood that remains in the cow, the better for US health standards and the meat in general. I've seen it done. They use a big mechanical saw to slice the cows throat and let it bleed to death, so that there is less blood...get it?
In all realness, I get your first point - but the rest is not what's really going on.