It is not scientific to say that they are hungry when they're hunting and they're tired when their tongues are hanging out, and then say when they're playing with their children and acting joyful and happy, we have no idea if they can possibly be experiencing anything.
Nav zinātniski teikt, ka tie ir izsalkuši, kad medī, un noguruši tad, ja ir izkāruši mēles, tai pat laikā, ja tie rotaļājas ar saviem mazuļiem un uzvedas šķietami līksmi un laimīgi, sacīt, ka mums nav ne jausmas, vai tie ir spējīgi kaut ko just.