As a pet owner, one thing that bothers me is people using nonstick pans (such as tefal pans) when they have pet birds. Without proper ventilation, these pans can actually harm or kill birds, as the fumes they let off whilst heating are very toxic. To make sure my birds will be okay, I prefer to use a heavy cast iron pan – they may be expensive to buy at first, but an investment in a Le Creuset pan will soon pay off – they do last forever.