Guardian: David Cameron has flown into the debate about culling seagulls, calling for a big conversation about the issue. The prime ministers call follows an attack on a pet tortoise in Cornwall this week. Liskeard resident Jan Byrne said that gulls swooped on tortoise Stig, who died two days later from his injuries. They turned him over and were pecking at him. We were devastated, she told the BBC. There have been two reports of seagulls attacking and killing dogs in England in the past three months....