Above advice is good but I suggest you do some door knocking too. Often owners are unaware of brewing issues and you could bring it to their attention. Talk about it in a moderate reasonable manner and canvas opinion. You might quickly find that there is either very little mood for change or there is a groundswell of anti-pet opinion. Try to avoid personal comment no matter how much you feel it is one person having a go at you. You might find others volunteer that your downstairs neighbour has had a go at them too and then you are starting to build a group of allies.
If you find that many people would be happy with status quo. If so, you could go to the committee and tell them the results of your straw poll. It might be enough to make them back off. If you have numbers at your finger tips and people now know you, you already have some power.