Death threats have been sent to the American dentist who killed Cecil the lion in Zimbabwe earlier this month amid growing anger over the protected animal's slaughter. Tributes to the butchered lion have poured in thousands of miles away at Dr Walter Palmer's office in Bloomington, Minnesota, where protesters dressed as 'dentist hunters' also threw stuffed lions at his house. Celebrities including models Cara Delevingne and Candice Swanepoel have also blasted the dentist, calling him a 'poor excuse of a human being'.