Just about any dog will get on with another as long as both are well socialised-- so you'd really be perfectly fine going with any breed or mix. You could get anything from a dog from the pound of a mixed background to a St Bernard to a chihuahua and they would all fit in fine with your existing dog as long as the new dog is well socialised. A couple of people here have schnauzers that live with their cavaliers. But if the schnauzer comes from a so-so breeder, of uncertaiun lines where temperament is not stable, and the breeder doesn;t adequatley socialise her puppies, you runs risks the puppy or adult would NOT get along, whether a schnauzer or any other breed. So the most important thing is picking a very good breeder, whatever the breed. Don;t order online, don;t go to a backyard breeder; go to reputable breeders who health tests and breed for conformation and temperament as well.
But note ANY allergy doctor will conmfirm that NO dog or cat is hypoallergenic -- there's simply no such thing and it is impossible. All mammals have to shed skin and pass some secretions through their skin -- and in addition, all dogs and cats lick themselves and dogs in particular lick *people* -- and saliva is usually going to make people who are allergic react far more than hair.
Many doctors feel the only reason some dog breeds cause fewer problems is that you will note they are all of breeds that go to the groomers every 4-6 weeks and are small dogs that people tend to like to wash -- and hence are more likely to be washed throughly on a regular basis. Shedding hair should not be much of a factor. When I had a cat allergyu, simply washing my cats every two weeks (yes, they tolerated this!
) greatly decreased the level of problems caused by their dander.
If you are thinking of a second dog I would really sit down and discuss this with your husband's allergy doctor. He could get a more severe reaction by introducing a second dog that would place you in the situation of having to get rid of BOTH dogs, which you don;t want -- in general I think unless your husbanc and you are really willing to reshape how you live in your house to thoroughly accommodate keeping it as allergen-free as possible, you run this risk. I'd want to discuss how severe the doctor believes the allergy to be, whether there are other things he is allergic to, whether they believe a second dog would stress his immune system to the point of worsening his basic allergy.
