Great, I'm glad to hear you are on top of it.Well... I can, but my girls have ate earthworms since they were born and have not had any problems. I do take several stool samples to my vet to check about 3-4 times a year. I know that they can still have worms, even with a negative sample. And gape worms are caused from eating earthworms. If they were to have any problems, I would not hesitate to spend $$ and take them to a vet.