Well first I'll start with, when 2 of my friends were on acid long before I ever tried it, and me and some other friends weren't on anything yet, waiting for our booze we swore we were getting some sort of contact high from the people on acid, not so sure about that one but-
The other day I was on acid and I was petting my kitty and he was acting really strange, in a good way... His eyes got really big and was staring at me straight in the eyes for along time, and also he started to rub his face and stuff... I dunno but it made me think if they can get contact highs.
okay i have a few stories to go along with this...
once two friends and i split a quarter of mushrooms through some tea. my friends dog, a little palmaranian, was fine. we started trippin and as soon as we all confirmed we were feelin it, the dog started shaking and running around the house. it was afraid of us for like 5 hours. if we approached it, it would either run away, or curl up in a ball and cower in fear.
as soon as we were done trippin the dog was fine again and acting completely normal... we spent a lot of the trip worrying that something was wrong with the pup, but now we all realize it was just feelin the change in our vibratrions.
next,
Anytime my gf and I take rolls at her house, her usually unfriendly, anti-social cat comes out and plays with us, and she rubs us with her face and purs non stop until we come down, then she goes and hides again.
also,
The cat acted even weirder when we took acid and rolls, she would run out from under the table and charge us full speed and jump and swat at us and then keep running. we had to put her in another room cause she was fuckin up our trip really bad.
Soooo. I believe that cats particularly are trippin 24/7 anyway just in the way they percieve their surroundings. and i don't think that being on drugs around animals makes the animal experience the effects... BUT i do believe that they DEFINATLY know when you're on drugs, psychedelics in particular, and their behavior can change dramatically for the duration of the experience.
so i think that this is what was happening with your cat, she just knew something was different about you.