Is it safe to leave a puppy alone with a toddler?

Toddlers do not yet reliably understand gentle handling, and puppies are still learning bite inhibition and impulse control, which together create real potential for an accidental injury on either side without an adult present to intervene.

Being in the same house is not the same as active supervision. An adult within arm's reach, watching the interaction rather than doing something else nearby, is what genuinely prevents most incidents.

A baby gate or playpen that separates puppy and toddler during any moment you cannot give full attention, cooking dinner, answering the door, is not overprotective, it is simply matching the level of management to how quickly things can go wrong between two unpredictable young creatures without any real capacity for restraint yet.

Many families find a specific handover routine helps, such as the puppy going into its crate or pen the moment a toddler's nap ends and unsupervised wandering time begins, so there is a reliable structure rather than needing to constantly reassess the situation in the moment.

As both the toddler and the puppy grow and demonstrate more reliable self control, typically over a year or more rather than weeks, supervision requirements can ease gradually, but this should be a deliberate, gradual decision based on what you actually observe rather than assumed once either one simply gets a bit older. Until then, treat close supervision as a normal, temporary part of raising both a puppy and a toddler together, not an overreaction.