Soutwest
Southwest Airlines says they don't permit any animals onboard. However, on many occasions I've heard more than on few moo's and even one baa while boarding.
A round of applause for easyJet.com today for confirming many passengers' suspicions as to how airlines view their customers. Try this answer to a query regarding "assistance", paying close attention to the category from which it comes: easyJet.com's answer to elderly passengers' assistance query classifies old timers as …