Don't think animals make a difference. We didn't have pets when she was diagnosed with the asthma. And having them or not has never made a difference.

She's actually been a lot better the past year or so. She has ventolin & a preventative, but hasn't needed them in a while. I've noticed a difference when we've been in more humid area's & when I know there's been mould in carpets etc.
Yes moulds and humid areas triggers asthma. For some people danders of animals and their furs can cause asthma too even the talc of a powder. So you also have to avoid these things.. good thing shes better now..