Cow or Ass
Srila Prabhupada was fond of quoting the Srimad Bhagavatam 10th Canto verse yasyatma-buddhih kuëape tri-dhatuke, sva-dhih kalatradisu bhauma ijya-dhih, yat-tirtha-buddhih salile na karhicij, janesv abhijnesu sa eva go-kharah (verse number 13), part of which makes a cow seem unintelligent. However, cows were Krsna’s favorite animal. This intimates that material intelligence will not endear us to the Supreme Lord.