Should pets be allowed in the office?

Our office got a dog in March. Not a policy, a dog: someone brought one, nobody said no, and now there are four. I am allergic. I said so, politely, in writing, and the answer was that I could work from home, which is a strange way to be told the dog has more right to the building than I do. I like dogs. I would like them to be somewhere else between nine and six. I am told this makes me the problem. So I am asking people who are not in my office: should pets be allowed at work? I say no, and I know how that sounds.