Hi A.,
I did develop an allergy to dogs and cats after getting married, buying a house then having kids.
I have multiple allergies. But a environmental allergist is where I learned that I have dust allergies and they consider pets like dust. The dust and particles will cling to their fur and when we pet them, wrestle with them on the floor it kicks up the dust off of them and the carpet, furniture etc.
The environmental allergist I go to gave me an option; do shots or do drops under the tongue as needed. I did drops.
I love dogs to much not to have them. I just work on my immune system and work on taking care of myself. My allergies aren't that severe.
Are you sure it isn't something else like the shampoo the rescue used on the dog? Maybe it was the breed?
With cats their is something in their saliva that people tend to be allergic to. When cats lick themselves their saliva is always exposed and when we pet them we then have it on our hands and if we don't wash them after petting the symptoms may begin.
I have a new sheltie with long fur; I have to keep up with the vaccuuming and dusting. Then I have to make sure I brush my new pup often and keep her bedding and blankets washed on a regular basis. Of course it depends how severe your allergy is. I know with the winter coming and the furnace is now kicking in, my dust allergies are now beginning again.
I've read that if you rinse your dog with distilled water it should help. If your house is dry in the winter, yes our pets can become static cling and attract more dust to them. I suppose one could spray a dog with a gentle mist of distilled water before brushing. I am going to try that with mine this winter. I just bought a Furemover deluxe rubber brush to brush the fur off clothes, carpet and furniture. So far it does work on the carpet. It is ectrostatic and has multi uses according to the package. It is made by Evriholder. I got mine from Linens and Things which sadly is going out of business. The companies phone number is: 800-975-0335 just in case.
Hugs to you and I hope this helps.
Linda