First off, There is nothing wrong with your dog. She's a year old high energy dog that mostly needs some serious exercise to blow off steam, and sounds like she's a hoot.
The taunting of other dogs was just her way of trying to get them to play, and to establish dominance (This is not a bad thing and is normal). The stealing of other dogs toys is sometimes called "resource guarding" and some females are more apt to do it based on genetics. She also sounds like she inherited some female dominance genes (Again not bad, it's a normal thing. Dominant is not a bad word ) I'm going to assume that her only chance to play with other dogs is at the dog park. If this is correct she is on sensory overload from the other dogs. I'm also going to tell you, that in my experience, Vizsla's "play" at a level that few breeds are capable of. They play hard, really hard. When I let my "monster girls" out, there are bodies flying and tumbling, they knock the snot out of each other.
There is a phrase coined "extending the leash",and this is where you're at. She knows that you cannot enforce the command, so she doesn't listen. To correct this behavior leash work needs to be re-established. Put her back on a 6' lead and work her at the heel until she is heeling at your left knee on a slack lead and moves in all directions with you, especially the left turn. She needs to focus all of her attention on your left knee, and where it goes she better be going too. You have a forward, dominant, independent dog,and you need to convince her that your ideas are better than her ideas.
Put her on a 9'-12' leash and keep a loop in your off hand. when she begins to pull on the leash, or move in a direction you aren't, drop the loop and immediately change direction, 90-180 degrees. Don't pull or yank on the leash. Drop the loop , change direction and keep walking at an even pace. She will be momentarily off balance from the release of the pressure when you drop the loop, and will have to move in the new direction to regain her balance. Keep a loop in your hand and change direction every time she exerts pressure on the leash. When she yields and changes direction walk backward encouraging her. Give her the come command and kneel and praise her. There has to be reward.
Work in the "come" and "stay" command on a 30'-50' check cord. When you give her the "come" command, she needs to start coming immediately, if not you reel her in all the way to you. Don't pull her off her feet, just a nice even reeling in. Once she starts to come on her own stop the reeling and let her come to you. If she dithers on the way in, give the command again and start the reeling in process again.
When she is 100% on the leash and check cord, and I really do mean 100%, and not just "okay", or "mostly", take her to a closed area where you have control, and go through the commands. If she blows you off, it's back on the leash. She'll eventually learn that you can "extend the leash" and "enforce the command".
When you take her to the park keep her on a check cord. It's a lot easier to get ahold of a 50' check cord, than a running Vizsla. Believe me when I say I have been there countless times in the woods with every Vizsla I have owned.
Working against you is maturity. She's only a year old, no longer a puppy dependent on you, but not yet an adult either. She's not ready for this much independence just yet without control.
Every time you give her a command you must be in a position to enforce it. In the house, on the leash, outside. etc. Don't give her a command you can't enforce, it will only perpetuate the bad behavior. Make sure every command is carried out to completion. For instance' If she is doing something bad and you give her the command "NO" and "Come Here". Both have to obeyed completely,with no middle ground. Additionally all of your family members have to enforce this with her at all times.
I have one just like her named Gunnr, after one of the Valkyrie, meaning "straight to battle". She also is only a year old. Gunnr will require a "firm hand" for a few years, and periodically through her life. A "Firm hand" does not mean to get rough with Gunnr up or beat her or get physical with her. It just means she'll not be allowed the same amount of slack a more biddable Vizsla could be given. My other girl, Teka, also requires a steady, consistent hand. She can be given a little more slack because I can get her mind back into the game and back on track from a distance when she gets squirrely. Gunnr is much tougher to reestablish the mental connection with when she gets squirrely. I have to keep her focused on me at all times or she'll get her own ideas.
I've trained some really steady, finished gun dogs. All of them from time to time have needed "tune ups" well into their careers with basic leash work. It's not a failure on the owners part, or lack of training. It's just the way it is. All dogs benefit from leash work.
In the end she may be on an E-collar, if that is the only way to "extend the leash".
I really think though that most of the issues will clear up with some serious exercise and training. Give her a job, she's looking for one.
The taunting of other dogs was just her way of trying to get them to play, and to establish dominance (This is not a bad thing and is normal). The stealing of other dogs toys is sometimes called "resource guarding" and some females are more apt to do it based on genetics. She also sounds like she inherited some female dominance genes (Again not bad, it's a normal thing. Dominant is not a bad word ) I'm going to assume that her only chance to play with other dogs is at the dog park. If this is correct she is on sensory overload from the other dogs. I'm also going to tell you, that in my experience, Vizsla's "play" at a level that few breeds are capable of. They play hard, really hard. When I let my "monster girls" out, there are bodies flying and tumbling, they knock the snot out of each other.
There is a phrase coined "extending the leash",and this is where you're at. She knows that you cannot enforce the command, so she doesn't listen. To correct this behavior leash work needs to be re-established. Put her back on a 6' lead and work her at the heel until she is heeling at your left knee on a slack lead and moves in all directions with you, especially the left turn. She needs to focus all of her attention on your left knee, and where it goes she better be going too. You have a forward, dominant, independent dog,and you need to convince her that your ideas are better than her ideas.
Put her on a 9'-12' leash and keep a loop in your off hand. when she begins to pull on the leash, or move in a direction you aren't, drop the loop and immediately change direction, 90-180 degrees. Don't pull or yank on the leash. Drop the loop , change direction and keep walking at an even pace. She will be momentarily off balance from the release of the pressure when you drop the loop, and will have to move in the new direction to regain her balance. Keep a loop in your hand and change direction every time she exerts pressure on the leash. When she yields and changes direction walk backward encouraging her. Give her the come command and kneel and praise her. There has to be reward.
Work in the "come" and "stay" command on a 30'-50' check cord. When you give her the "come" command, she needs to start coming immediately, if not you reel her in all the way to you. Don't pull her off her feet, just a nice even reeling in. Once she starts to come on her own stop the reeling and let her come to you. If she dithers on the way in, give the command again and start the reeling in process again.
When she is 100% on the leash and check cord, and I really do mean 100%, and not just "okay", or "mostly", take her to a closed area where you have control, and go through the commands. If she blows you off, it's back on the leash. She'll eventually learn that you can "extend the leash" and "enforce the command".
When you take her to the park keep her on a check cord. It's a lot easier to get ahold of a 50' check cord, than a running Vizsla. Believe me when I say I have been there countless times in the woods with every Vizsla I have owned.
Working against you is maturity. She's only a year old, no longer a puppy dependent on you, but not yet an adult either. She's not ready for this much independence just yet without control.
Every time you give her a command you must be in a position to enforce it. In the house, on the leash, outside. etc. Don't give her a command you can't enforce, it will only perpetuate the bad behavior. Make sure every command is carried out to completion. For instance' If she is doing something bad and you give her the command "NO" and "Come Here". Both have to obeyed completely,with no middle ground. Additionally all of your family members have to enforce this with her at all times.
I have one just like her named Gunnr, after one of the Valkyrie, meaning "straight to battle". She also is only a year old. Gunnr will require a "firm hand" for a few years, and periodically through her life. A "Firm hand" does not mean to get rough with Gunnr up or beat her or get physical with her. It just means she'll not be allowed the same amount of slack a more biddable Vizsla could be given. My other girl, Teka, also requires a steady, consistent hand. She can be given a little more slack because I can get her mind back into the game and back on track from a distance when she gets squirrely. Gunnr is much tougher to reestablish the mental connection with when she gets squirrely. I have to keep her focused on me at all times or she'll get her own ideas.
I've trained some really steady, finished gun dogs. All of them from time to time have needed "tune ups" well into their careers with basic leash work. It's not a failure on the owners part, or lack of training. It's just the way it is. All dogs benefit from leash work.
In the end she may be on an E-collar, if that is the only way to "extend the leash".
I really think though that most of the issues will clear up with some serious exercise and training. Give her a job, she's looking for one.