When I am about to have angina issues that require Nitro.she will sit on my lap place her paws on my cheeks and she licks my nose .....It took me nearly a week to figure out that when she did this I wound up taking Nitro. Once I did I knew to take it before the attack occured. Donna knows that if I had listened to Lex this past few days I would not have been in the hospital. My cardialogist has seen alert during stress tests, and told me that I should never leave home without the cat! Maybe I should rename her American Express?