Nation Toddler mauled by pack of puppies: Is ‘littermate syndrome’ to blame? Vets say probably not June 16, 2022 Natalie Neysa Alund, USA TODAY Comments Off on Toddler mauled by pack of puppies: Is ‘littermate syndrome’ to blame? Vets say probably not On the day of the attack, the toddler was outside with her family and the family's four 12-week-old puppies. preparing for a housewarming party.