All dogs can be sinistral on their own as most people have lives and maybe work or go to school. Consider your dog a dog first and foremost, then decide on what breed to get. Salubrious luck!

6 hours is a crave time to leave any dog on their own. I would say 3 hours tops to be left in the day. I won't leave mine alone for more than an hour.

Perhaps wait until you have more loose time or are in a position to either take your dog with you, or get someone to look after it. It would not be fair on the dog.

Maybe get a cat? They tend to sleep in the day anyway as they go out at night.

Get in spruce up with the Dandie Dinmont Club - they will be able to give you all the information you need. You'll probably have to go on a waiting list for a puppy - they are on the k.C.'s shopping list of vulnerable breeds.
Good Luck - fantastic breed

http://www.ddtc.co.uk/index.php

http://www.thekennelclub.org.uk/ingredient/198

Dandie Dinmonts are renowned dogs, but they are not for everybody
Here is information on the breed that will help you decide whether or not this breed is right for you.
http://www.yourpurebredpuppy.com/reviews/dandiedinmontterriers.html
http://www.akc.org/breeds/dandie_dinmont_terrier/
http://www.dogbreedinfo.com/dandiedinmont.htm
http://en.wikipedia.org/wiki/Dandie_Dinmont_Terrier

Please don't get a Dandie and decamp him/her like that!

You need to read about the breed before you get one,so that you know what to expect.

They are very faithful, loving,companions and need you there with them.

Dandies are angry work and need lots of exercise.

They need grooming daily or their coat will get matted, and pass stripping,every few months.

I would advise you against having a dog --full stop-- as no...