Will My Daughter's Medications Keep Her Safe From Her Asthma Trigger?

Question

My daughter is allergic to horses and that has induced the asthma in her. It is not too severe, only a slight breathlessness, itchy eyes and itchy palette. Before she goes riding, she takes a puff of Intal and she is just fine. She is also on Allegra. Has anyone experienced any problem like this? If so, did the problem become worsen or remain the same? She desperately wants a horse. We always keep her away from barns and when she is near horses in the open air, her symptoms are greatly reduced.