Originally Posted by owieprone

marcia you get snails all over the world, including africa and other hot climes.

mice and rats eat snails no problems at all, they are not a regular food item but they do eat them when their main diet is reduced.

If there was only the one baby snail in there i wouldn't be worried as it may have been after packaging contamination, or just blind bad luck. Food packaging for animals is generally very controlled but as it's bird seed then you're out of luck as birds are big snail eaters so contamination in their food isn't a big deal to the manufacturers or the sellers or the pet/wild animal food authorities.

Check the rest of the food if there are more snails get rid of the contaminated stuff, as you will have hundreds of the things floating around showing up for YEARS. If you've ever kept an aquarium and have had snails accidentally introduced via plants you'll know what i'm on about.
they're a pest rather than a poison problem.