If you are allergic to dust dogs then you suffer from Allergies Type
1, also called Contact Allergies. You can be allergic to dander,
saliva, or urine. Pet hair itself does not product allergic reactions
in individual, but the dog dander that will stick to the dog hair will.

The allergy producing proteins called allergens are products in the
dogs skin.read more
on....http://www.articlesforall.net/health/allergies/help-i-am-allergic-to-puppi\
es.php

Regards,
Stephanie