Yes. The active ingredient iron phosphate also occurs in nature. Even if a bird, pet, hedgehog or earthworm feeds on a pellet they will not be harmed. This is one of the main reasons why iron phosphate pellets are approved for Organic gardening, recommended by Which? Gardening and are the slug pellet of choice of the Royal Horticultural Society.
Please note that all plant protection products such as these, have to include standard safety warnings on the packaging which relates to keeping out of the reach of children and pets. This is standard good practice.