Let's be direct, because a child's and an animal's wellbeing are on the line. No system makes injury impossible, and anyone promising a guaranteed or risk-free outcome isn't being honest with you. This guide is practical support, not a substitute for veterinary, behavioral, or medical advice.

Do this in the first week:

• Book a wellness visit with your veterinarian to confirm the puppy is healthy, appropriately vaccinated, and free of parasites — some of which can pass to children.

• Ask your vet directly about any behavior that worries you.

Contact a certified professional if the puppy shows:

• Repeated aggression, intense fear, or resource guarding around food or toys.

• No ability to settle at all after the first week.

• Look for a certified dog behavior consultant (such as a CDBC or CBCC-KA) or a veterinary behaviorist, and choose someone who uses reward-based, force-free methods.

Get medical care immediately for injuries:

• Any bite that breaks the skin — do not downplay small nips, especially near the face.

• For your toddler, call your pediatrician or urgent care for puncture wounds, and seek help sooner rather than later.

Pause the whole plan and reset to full separation (Two-Room Rule at all times, meetings only leashed and adult-controlled) if:

• You notice escalating tension between them.

• Your toddler is repeatedly frightened.

• You personally feel too stretched to supervise well. A few extra days behind the gate costs nothing.

Bring in expert eyes early — this is a sign of a great owner, not a struggling one — if you have a puppy from an unknown or traumatic background, a size mismatch you're unsure about, a child with additional needs, or a gut feeling that something is off. Trust that instinct.