Border Collie/German Shepherd

Question
I have a Border Collie/German Shepherd that I got when she was just a puppy, she is now 1 year old and I have having a time with her getting stuff off my front porch or just anywhere and chewing it up, just this morning we found that she had jumped up and got down off my house an itme that was there hanging that said "WELCOME" when you come up to my front door, she jumped up and took it off the house and chewed it up, she has gotten my plants that was on my porch and chewed them up, wires that is on my trailor, chewed them up, I just can not stop her from chewing our things up, I need help, I do not want to give her away, I want her to STOP.  Can some one help me?

Answer
If the dog is being left by itself most of the day, I doubt there is much to you can do. Not being a professional, I don't have to come up with an answer.  Some of them's answer for this is a 3 hour walk every day leaving the dog too tired for such.  

You could crate the dog when left alone, but I hate to see a dog crated more than 4-5 hours at a time.  If you couldn't give it a mid day break, perhaps a neighbor or professional dog walker could.   Other dogs may
not be as bad as the young Labs I am plagued with.  Still your house and dog
will be much safer with the dog in a crate when you are away.  The dog may be
happier in its den than loose in the house.  It relaxes, it feels safe in its
den.  It rests, the body slows down reducing the need for water and relieving
its self.  Dogs that have been crated all along do very well.  Many of them
will rest in their crates even when the door is open.  I think the plastic
ones give the dog more of a safe, enclosed den feeling.  They are harder for
dogs to open too.    Metal ones can be put in a corner or covered with
something the dog can't pull in and chew.  Select a crate just big enough for the full grown dog to stretch out in.

Leave it some toys.  Perhaps a Kong filled with peanut butter.  Don't leave
anything in the crate the dog might chew up.  It will do fine without even any
bedding.  You will come home to a safe dog and a house you can enjoy.

A dog that has not been crated since it was little, make take some work.
Start out just putting its toys and treats in the crate.  Praise it for going
in.  If you have been able to trust it with any bedding, put that in the crate.
Feed it in the crate.  This is also an easy way to maintain order at feeding
time for more than one dog.  

Border Collies are supposed to need to keep busy.  Being crated all day could lead to problems.  A better solution might be doggy day care.