[Nebulosa]

Elletric collars commonly isn't used for training, but for correct some little imperfections at commands in a working dogs that will make official exams, like Schutzhund and IPO.
The dog may not fear your command because the shock, he must respect you and because this obey, he must see you as the leader of the pack.

But what am I to do when she bites someone ?!

And what would you do if she really attack someone? coock her with the eletric collar? Eletric collar isn't painfull enought to stop an furious attack when you have no control of the dog and when the dogs really thinks that attack is needed.

Are there any side efects to the use of the electrical collar? I am mostly worried by heart problems..

The eletric colla rmust cause only a strange fellin in the dog necks, isn't painfull but isn't good, that's why you must test the eletric collar in your neck BEFORE use it in the dog, in this way you will know how strong is the collar and if you need up or down the strenght of the shock.

My dog had 2 trainers, the first at 5 months, she bit and thore his trousers, then the guy would not answer my phone calls. The second one at 11 months, she thore his t-shirt, the guy did not come anymore...

What good trainers you had find, they're only accustumate to traine lazy dogs basic commands?!
First of all, I don't think you will find easly a good trainer, but believe me, worst than it is find a good trainer that are able to traine a wolfdog or that have th eminimally good experience with the breed, principally in your country wich czW not seems to be a common breed.
That's why before you chose this breed, you must read and know that this is a difficult breed wich need a very experienced owner and be aware that you cannot count with the help of supposed proffessionals if you have behaviour problems with your dog, normally the breeder must be prepared to help in this case.

She is incredible protective of me. Today she bit a person that aproached my friend.

Agressive reaction not ever means protective in corageous and guard way, but commonly a bad unthinkied reaction for fear and untrusth wich sometimes make us think in a corageous but reactive dog.

I am hoping that she will understand that she needs to listen to me and than stop using the thing.

Maybe, if you're able to make her conect your command to the shock, but this is to much strong for a 13 months old puppie wich have no head and is only testing the leardership of the owner... this if she already not take your place as alpha because the lack of a good and strong leader in the moment.

but when you use eletric collar to training the dog like it some dogs can start to show a better resistence against the shock with the time, even stop to gives attention to it, it would be a really big problem if she be trained only with the eletric collar without respect you really. That means, you cannot be dependent of the eletric collar, or probably you and your dog will have future problems because the eletric collar and because it's bad use.

Please, first of all NOT leave she outleash even she be an educate girl wich respect you and wich you have full control, this surelly will avoid accidents and problems for you, you must take the leader place at your home, fight for leadership is almost a dispute to see who have hardest head, you or the dog? Surelly you must see more stubborn than your dog for win.

- Feed her 3 or 2 times per day, you put her food at the dish and call her, gave 5 minuts for her comes and if she not comes you take out the food and save it on a properlly place, only gaves food for her again in the next round, she can refuse eat for 3 or 5 days, not brake your hearth for it and continues, when she be really with hungry she will comes and eat when you call.

- Try go to long walks with her AT LEASH, if she start to pull you or try to path the direction you stop and only back walk when she acept stop, if she start to guide you simple go in the contrary direction even if you need pulling her at the direction you want.

- At house some dominant dogs like to lie down blocking the corridor or doors passage, if she do that you may not jump for divert of her, but take her out of this place for you pass.

- Before gives gifths to her you may charge little exercices for she win the gifth, like sit or down, only after she makes what you want you may gives the gift.

Never forgeth, leaders are stubborn, hard head and selfish, you must be too.

In a beauty day she is down sleeping at sofa, you want sit in this sofa, why not sit EXACTLY where she is sleeping, making her go to another place?
Stole her play at the moment that she is having funny?

This is an exemple that will depend of the dog reaction against you in this situation, you must be aware that some dogs growl and even try to gives one advertence bite in these moments, you cannot fear your dog, if she try do it you can have a more energetic reaction.

Please, contact the breeders and talk about your problems with the dog, maybe the breeder will be able to help you with his experience.

Hide your eletric collar and only takes it again when you have a really well trained dog and need it for put perfection in the comands before you go to a working trial with your dog... I think you wont need it with a CzW anymore.