[Outlaws_Gunn]

My gelding, previously my moms gelding, has always been a biter. Bad! I've tried everything from completely ignoring him, to whacking him with a crop/stick/lead. I know it's wrong, and I hate doing it, but the ONLY thing that will make him stop is a snap in the mouth. He's gotten so bad from my mom feeding him treats that I've ended up making him head shy. I have bruises all over me from him biting. And they aren't just little nips, they're 'I don't wanna do that! RAWR!!' bites. Lol.
Sometimes they aren't as bad, but he will be perfect one day and at the very end of the lesson/ride, catch me off guard and take a chunk out of me. Usually my arm, side, shoulder- or worse, my ****!!!! O_O
He's a hazard around small children and dogs because he bites. And if you have ANYTHING in your hand, whether it be edible or not, is food in his eyes. He's bitten two cell phones so hard the screens cracked. Ripped shirts, belt loops, pulled chunks of hair, bitten the cats tail (lol), etc. He JUST WONT STOP!!
Other than a muzzle 24/7, idk what to do. I need help!! He's come such a long way from the nut he was. This is his worst habbit and he's had it since before we bought him. (I worked for the man that owned him previously. ) I thought it might be pain somewhere at first, but it doesn't matter what you're doing to him he bites you and everything else in reach.
PLEASE HELP! What do I do? Or is there anything I can do?

[MuckMuck]

Please tell me what else he bites.
Does he bite wood,rubber balls,other horses,or any other thing besides a person?

Is he more likely to bite before or after a ride?

How old is he?

Does he play hard with other horses like rearing and boxing?

Is he more or less likely to bite with a bit in his mouth?

Does he bite just before feeding time more or less?

[belle4]

The first thing I would do is obviously stop feeding treats. You have to set him up for success, praise the good and don't let your guard down.

[Outlaws_Gunn]

MuckMuck:
He bites ANYTHING and everything w/in his reach. People, wood, plastic. So, yes.
Before or after a ride, basicaly the same. If he's been worked good he slows down the biting some while he's catchin his wind, but then starts right back up again.
He's 6 1/2, yes he plays hard w my pony mare. They run, kick, bite, etc. Very rough play.
Bit doesn't make a difference. He might ease off now and then cause he's playin w the bit, but it's the same.
He's actually VERY good at feeding time. That's the only time he doesn't bite at all.
He's an extremely playful boy, and he sometimes nips just barely as if to say 'wanna play?'. But, I make a buzzer sound 'AAHH!!'

belle4
He doesn't get treats anymore. Hasn't had them in over a year. And when 'I' fed them, they had to work for them by doing a trick. (Bow, answer yes or non, etc. )

[allison finch]

When was the last time his teeth were floated? Is he a cribber?

Anyone feeding that horse treats would be escorted behind the barn with a dressage whip!

I had a stallion that was very mouthy. I carried a dressage whip and tapped him on the front of the cannon bones when he nipped. Then, when he stopped and stood, I would greatly reward him. The "correction" was not painful and only served to isolate the behavior I was addressing. Within two weeks he totally got it and was so much better. I had to be consistent and fair. He was always looking for the praise for being good.

[Outlaws_Gunn]

we're getting his teeth done in a few weeks. He needs it. But, he's always been this bad. Not just lately. No he's not a cribber.

Lol about the dressage whip. I've threatened people w mine. Haha!

We did a session of basic respect yesterday and he seemed to understand a little better then that I didn't want him to bite.

[MuckMuck]

OG,
I have a suggestion that you might want to try just to gather a little more information.

The next time that you are hanging around his stall or paddock,Just put a bit in his mouth with no reins and also use a nose band.

Let him wear it around for a few hours and keep an eye on him.

Does he continue to mouth the bit or does it slow down?

Some of these horses act like they need pacifiers to keep their little mind occupied and out of trouble.

Please let us know.

[ColorMyWorld]

There's no excuse for biting. It's a very dangerous habit and can be dangerous for the horse as well. If you would have to for some reason rehome this horse, it'd be a lot harder being he's a biter.

My 5 year old paint mare was a pretty good biter growing up (had her since birth.) It took awhile to get it out of her. I had to get REALLY tough to get her to stop. She still tries to get nippy once in a great while but is a lot better.
She's always been really mouthy as well. Sounds a lot like your horse.

However, biting is not an excuse for anything. Especially you.
Carry a crop or dressage whip, etc with you at all times.
You don't always have to hit him with it but get him moving.

If he goes to bite you or does bite you, get after him. Crack him on the butt, shoulder, etc, and drive him away from you. If you're in the pasture with him and he bites at you, chase him away and keep him away. If he tries to come to you again, chase him away again.

If you're leading him and he bites, swat at his chest and make him back up a good 50 ft. I'd also start leading him with a long rope and if he bites get him moving asap around you-like lunging. After a few minutes of brisk trotting or loping, pull him up and go on like nothing happened.

That's what really helped with my mare. She learned that biting only got her driven away or worked plus usually smacked somewhere.

[sorrell]

I had a stallion that was gelded late and he would do that. Bite dogs too. I cured him of biting me by carrying a fence staple/horseshoe nail the rounded u shaped nails you use for fencing, between two fingers and when he'd go to bite, I'd hold the hail up and he would run into the nail and bite himself. He decided that wasn't any fun and quit biting.
My half arab will nip at times thinking he is playing with me, and I just remind him by backing him up, or pointing a finger at him, that this is not funny, no matter what he thinks!
Some horses can be mouthy, but if they are biting to hurt, then setting them up so that they punish themselves when they try to bite you works very well as a deterent.
I read the book with the kid who is told to put a hot baked potato under his shirt sleeve so when the horse bites, he gets burned, but tried that and burned my shoulder and the horse bit me on the leg... so.... but the theory of making it unpleasant when they do something unpleasant to you, and rewarding by praising when they show realization that biting is wrong, can be beneficial.

[Outlaws_Gunn]

MuckMuck:
When the bits in, he messes w it for a few then stops.

ColorMyWorld:
Yes, that's what I told my mom about the treats and she stopped then. But, I've tried the crop and whip and giving him a good smack. He stopped for a while, but as soon as I thought he was finally learning, he did it again. I normally carry a 5' cane pole around w me, but I don't 'always'. I'll get my crop, though, and use it again.

sorrell:
I did this with a fork and he just bit me somewhere else. :/
Ss farm told me about the potatoe thing. I'm thinking about trying that.

So, thank you all. I don't mean to seem like I'm shooting down everyone. But, I've tried almost all of these options and he still does it. I'm open to anything, though. And I may try some others again.