What Barry said

I've never had any issues with a pet after it was disco'd. I just tell the pet to stay after it's tamed, move out of range and wait a minute, then the disco effect has worn off and the pet is back to normal.
Para taming used to be a sure fire way to get your target pet really angry and puffing fire, I got dragon-chomped badly the first and only time I tried it on a dragon - he magic arrowed himself, broke his para and ate me. I took the hint!
I only para tame cu sidhe that I don't intend to keep, and even then I really only para tame when I'm tired and likely to get stuck on a bit of terrain and eaten. You can safely use para on pets whose skills aren't above GM, as that only takes you down an extra 4% skills and you can still train them back up again. But I don't, because it just means extra training time at the end and it's always quicker to just buckle up and do a basic lead tame.
Wenchy