A Poisonous Enigma

ep 43 https://www.tfo.org/en/universe/petz-club/100426244/a-poisonous-enigma

Two of the neighbourhood dogs have fallen sick. When Gilou examines them, he suspects food poisoning. Elodie, the owner of one of the sick dogs, calls the Petz Club, and they quickly set off on the trail of a strange person who seems to hate dogs. Has this terrible man been poisoning the cats and dogs?