Dog Allergic To Railroad Ties Can A Dog Be Allergic To Dust?

Can a dog be allergic to dust? - dog allergic to railroad ties

My dog sneezes again, and I'm pretty sure this is allergic to dust, is it possible?

In addition, chewing his paws constantly, so sometimes red, and the vet said it was and give him a Benadryl allergy (not working yet) someone the same problem?