Not all terriers dig. I have a terrier and we have no digging problems. We're also long past the constant pulling when on walks problem. In as non-rude a way as possible, the problem is mostly you. First, the dog is almost certainly bored. It sounds like you keep her outside most of the time, and are "stuck" bringing her in for a few hours a day to stay cool. Again, no offense and not to be rude, and I know you didn't say "stuck", but why exactly did you get a dog in the first place? Dogs are social animals, they are pack animals...it's bored out there, among other reasons for digging. Also sounds like she is still relatively young and, not suprisingly, younger dogs just have more energy. My suggestions for a better lifestyle for your dog and you would include the following: 1. Definitely try the poop in the hole trick. I have known it to work for many dogs. 2. Bring your dog inside. This doesn't mean let it loose in the house at all times. Get a crate. No, a dog doesn't want to be crated 24/7 either, BUT do not look at a crate as "punishment". In addition to being pack animals, dogs are den animals. The crate should be their home. Our two dogs sleep together in a big crate with a bunch of blankets, toys, etc. in them. They are to the point where they will just take a nap in their crate even if they aren't being put up in there. It's their home within our home. Some people will feed their dog in their crate, too - this reinforces the crate concept as a positive place for the dog that they know is theirs. 3. Call a dog trainer. I would recommend - http://doubledogtraining.com She's not quite Cesar Milan, but she really is pretty close. She trains in very very similar way. She will come to your house, teach you how to use a choke chain or slip leads, and most importantly teach you how to be the pack alpha. It won't be as cheap as doing one of those mass classes at Petsmart, but it will be well worth it. If you really take the training you'd get to heart, your behavior and the dogs behavior WILL change. You'd be amazed at the number of little times during the day where you are sending mixed messages to the dog, inadvertently praising her when in reality it's reinforcing a trait you don't want her to continue, etc. I'd also wager to say, if you really take her training to heart, you will find yourself just being a more confident person in general - again, the goal and result will be to make you the alpha of the pack. And at a minimum, if all you do is 1 session of training, it will be educational to you to see what is possible. I guarantee you that by the end of that first session, Anita (the trainer) will have your dog behaving totally differently. With our dogs, when they were first trained, it took only 5 minutes for them to behave differently - took much longer for us to get the hang of it, though. I'm sure you knew this going in, but it should also be a good time to remind you, that owning a dog does require "work" - if it's all work and no play, then that's no good. It shouldn't be that. But a little bit of work, a little bit more knowledge on how to help you and your dog live a happier life, and it will be highly rewarding.
Bingo. This is the best thing you can ever do. Man's Best Friend was worth every penny. Then you HAVE to walk the dog EVERY day.
If walking everyday is not possible, then try a treadmill...I saw that on Dog Whisperer show...a friend of mine has a treadmill to walk her freakin 10 dogs!
My husky used to dig alot.. I put its crap where it used to dig it worked.. you can also try something spicy that will scare the dog away after it smells it.. like chili powder
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Give the dog some exercise and keep it in the house. Mine have a 4x4 ft kennel inside where they go when I have guests (one of my dogs doesn't care for visitors) or when they need a timeout. One thing people don't realize is that doing obedience work will help the dog release energy. Remember the last time you started a new job? Remember how tired you were every day for the first few days/weeks because you were so focused trying to learn the new tasks? Dogs are the same way. Engage them mentally and it will zap them of all that energy even if you are not making them doing anything physically exerting.
I have a Rat Terrier too! She is the most well-behaved and friendly dog I have ever had. Rat Terriers are more docile... and less feisty than Jack Russells. I have two dogs. I take them to the park every single day, and walk them for about two hours. They don't do anything inside the house except sleep and eat.
Thanks to all the replies, I think you've successfully extended my desire to be dog free for at least another year.
I havent watched her show a lot but she seems to use too many gimmicky bells and whistles to train the dogs.