Ya know, as many cottonmouths as I've seen and are around, I don't know anyone that's been bit by one. I know of one guy that died from a rattler, had a dog killed by a rattler, had a cat I managed to get to the vet, half his leg rotted away, but he survived and healed. And, I know a guy I used to work with that was bitten by a rattler. Rattlers are NOT aggressive, but they will defend themselves and are often not seen until it's too late via the habitat they frequent. The guy that was bit said it stung like hell. It happened in his 16 acres behind his house near town and he got to the hospital post haste and it was already swollen twice its size when he got there. He got over it, but he said it was NOT a fun experience and it's not something I wish to try. My place is farther out of town, would probably not die, but I mean, I might wish I was before it was over.
Seems like dogs are very susceptible to 'em, die pretty quick. Cats are more resilient, and humans fall somewhere in there with cats. Man, I wouldn't want my leg lookin' like that poor cat's leg, I can tell ya that! When she drug up here, the maggots were working on the dead flesh, it was awful. Vet cleaned it up, patched her up, and it took a couple of months before she got the bandages off and started feeling like herself.
I don't think cottonmouths are as bad as rattlers, but I ain't volunteering to be the guinea pig, I can tell ya that! They do have some vicious looking fangs in their mouth, just like a rattler. They're nasty snakes. I like fried rattler and they're easy to clean, but I'll take a pass on cottonmouth.