off leash dog training

I need help strap (without belt) to train my puppy?
my puppy Bella (7 months) was made without belt twice this week. Once the fault belt and the other slipped through the door. Now, please, not obvious how to get your new belt, because I know that I need to know is how to train his belt. The two times that just got his back so I need to know how to train her. she is a rescue dog (a mutt), but we know she has some whippet (like a greyhound but different), these types of dogs are very fast and, apparently, very difficult to leash train (Iv'e been said). but she is a student fast, so I think it's okay. Please help me, this is my first dog (I'm thirteen) and I really do not want to lose this way. Thanks Nikki Notes: There is a room in the fenced area (not a dog park though). People in the shelter, said it should not be off leash, but has yet to learn this
We must work in teaching to come. No, you should not expect her to be offleash 100% reliable, but for accidents that occur, you need to know to get to your call. Working with her, while on a long leash or in a fenced area (id recommend using a leash at first) the order of their "Beautiful, Come, gently pulling the belt towards you. Praise and reward her. Use a very good reward … chunks of beef hot dog or lunch, something he really likes. Do not repeatedly say .. come she has to learn that has to come the first time I said (which is why the use of the leash at first so that you can in your reel toward you) while she reliable command can test on a leash in a fenced area. ALWAYS reward .. make it a good reward never command your dog to come to you if you going to do something unpleasant, as giving medication, bathing, etc. If you have to do something unpleasant to her, go for it. Obeying the command is always positive and rewarding for her. If you let your game a park outside dog leash. Practice of the order once she has it down. Call to come to you, praise her, then go play again .. This so she doesn't think it goes too long will result in a belt and get out. This is a command that should always work if you wait for it to be reliable. Used day to call you for a reward, attention, or a favorite game.
Off leash Dog Training (K9-1.com)