Ep 18. Logan Super Sniffer Dog

Logan the rescue dog turned apprentice 'pollution sniffer' reports for his first big day on the job; Midge, the one-eyed racing cat, faces off against a top human sprinter; the Fanimals find out if a farm's worms actually outweigh its cows; and, from electric eels to light-producing glow-worms, meet the most innovative animal inventors of all time.