Cats injure, torture, and play with their prey before killing it. Humans should not do that.
Secondly, you say that hunting is permissible if you're hunting for survival. Why doesn't the same apply for slaughter? You don't need to eat farmed animals for survival.
The same would apply for slaughter - if it would be a survival matter, then any methods would be permissible (i.e. some of the more cruel traditional approaches) but since it is not, it should be mandatory to use only the less painful approaches to slaughter.
I don't think it's ok to torture a fox because it had a nice life before the torture started.
I don't think it's ok to torture a fox because we kill a lot more cows than foxes.
I don't think it's ok to torture animals that we raise for slaughter. I pay more for organic grass-fed cattle, free-range chicken and eggs, etc, in the hopes that the animals that provide my food were treated well while they were alive.
As I said at the start, I'm not a vegetarian. I'm definitely a part of the animal food chain, so I'm ok with the killing of animals further down the chain for me to eat, and I avoid the animals further up the chain so that I don't get eaten. (I wouldn't blame them if they got me, though.) What I object to is killing in a way that causes more suffering than it has to.
I don't eat meat for pleasure, particularly, and certainly not as recreation. Fox hunting is purely recreation.