The First Minute After Birth: A Practical Step-by-Step Resuscitation Protocol for Puppies and Kittens

The first minute after birth represents a critical window in neonatal care, where timely and appropriate interventions can significantly influence survival outcomes. In puppies and kittens, this period is defined by rapid physiological adjustments, and any delay in recognizing or managing compromised neonates can lead to deterioration within seconds. A structured, evidence-based approach during this phase ensures that veterinary professionals can act decisively while minimizing unnecessary or potentially harmful interventions. 

Understanding the Objective of the First Minute 

The primary goal during the first minute is to support the newborn’s transition from placental to pulmonary respiration. This involves ensuring: 

• Adequate airway patency  

• Initiation of effective breathing  

• Maintenance of body temperature  

• Early assessment of cardiovascular status  

These interventions are not sequential but occur concurrently, requiring coordination and clinical judgment¹. 

Immediate Actions at Birth 

Immediately after delivery, every newborn should be rapidly assessed for vigor. A vigorous neonate typically demonstrates: 

• Spontaneous breathing  

• Vocalization  

• Adequate muscle tone and movement  

Such neonates generally do not require resuscitation and should be placed with the dam for maternal care¹. However, nonvigorous neonates, those that are apneic, weak, or non-responsive, require immediate intervention. 

The first actions include: 

• Drying the newborn using a warm, clean towel  

• Providing tactile stimulation through gentle rubbing  

• Positioning on a warm surface to prevent heat loss  

These steps not only stimulate respiration but also reduce evaporative heat loss, which is a significant risk in neonates due to their limited thermoregulatory capacity². 

Airway Clearance: A Balanced Approach 

Establishing a patent airway is essential. In most cases, fluid present in the upper airway is cleared naturally in vigorous neonates. However, in compromised newborns: 

• Excess fluid around the nostrils and mouth may be gently wiped  

• If excessive oropharyngeal fluid is present, gentle suctioning may be performed  

Importantly, aggressive or routine suctioning is discouraged, as it may interfere with lung aeration and delay critical interventions such as ventilation¹. 

The practice of “swinging” neonates to clear airway fluid is strongly discouraged due to risks of trauma, intracranial hemorrhage, and aspiration¹. 

Temperature Control: Preventing Hypothermia 

Hypothermia is a common and often under-recognized complication in neonatal resuscitation. Newborn puppies and kittens are particularly vulnerable due to: 

• High surface area-to-volume ratio  

• Limited energy reserves  

• Immature thermoregulation  

Maintaining a body temperature between 35°C and 37°C (95°F–99°F) is recommended ¹. 

Practical measures include: 

• Use of warm towels  

• Placement under a radiant heat source  

• Avoidance of direct contact with cold surfaces  

Care must be taken to avoid hyperthermia, as overheating can be equally harmful. 

Heart Rate Assessment: The Key Decision Parameter 

Within the first 60 seconds, heart rate (HR) should be assessed, as it serves as the most reliable indicator of neonatal status. 

Methods for HR assessment include: 

• Apex beat palpation  

• Cardiac auscultation  

• ECG or Doppler (if available)  

Pulse oximetry alone is not recommended for HR determination due to inaccuracy in the immediate neonatal period^1,3. 

Clinical Interpretation of Heart Rate 

These thresholds guide the escalation of resuscitative measures and should be interpreted in conjunction with respiratory status¹. 

Respiratory Assessment and Early Intervention 

Respiratory effort should be evaluated immediately after HR assessment. Normal respiratory rates in neonates are typically above 15 breaths per minute, although higher rates may be observed¹. 

Signs of concern include: 

• Apnea or gasping  

• Weak or absent vocalization  

• Cyanosis  

• Labored breathing  

In such cases, positive pressure ventilation (PPV) should be initiated promptly. 

Timing Matters: Early Ventilation Saves Lives 

Evidence suggests that delays in initiating ventilation can significantly increase mortality. In neonatal studies, each 30-second delay in starting PPV has been associated with increased risk of death¹. 

Therefore: 

• PPV should ideally begin within the first minute of birth in nonvigorous neonates  

• Airway clearance should not delay initiation of ventilation  

This emphasizes the principle that ventilation is the priority intervention in compromised newborns. 

Concurrent Interventions: Multitasking in Practice 

One of the defining features of neonatal resuscitation is the need to perform multiple interventions simultaneously. For example: 

• While one team member dries and stimulates the neonate  

• Another may assess HR  

• A third prepares equipment for ventilation  

This highlights the importance of preparation and team coordination, particularly in anticipated high-risk deliveries such as Cesarean sections. 

Avoiding Unnecessary Interventions 

Not all newborns require aggressive resuscitation. Over-intervention can be detrimental, especially in vigorous neonates¹. For example: 

• Routine suctioning is unnecessary  

• Oxygen supplementation without indication may not provide benefit  

• Drug administration should be reserved for specific scenarios  

Clinical judgment is essential to balance intervention with observation. 

Reassessment and Decision-Making 

The newborn should be reassessed continuously during the first minute. Improvement in: 

• Heart rate  

• Respiratory effort  

• Color  

indicates successful transition or response to intervention. 

Conversely, lack of improvement necessitates escalation of care, including: 

• Continued PPV  

• Advanced airway management  

• Initiation of CPR if indicated  

Conclusion 

The first minute after birth is a decisive period in neonatal care, requiring rapid assessment, timely intervention, and continuous reassessment. By focusing on airway management, temperature control, heart rate evaluation, and early ventilation, veterinary professionals can effectively support the critical transition from fetal to neonatal life. 

A structured, evidence-based approach not only improves outcomes but also ensures that interventions are both appropriate and safe. In neonatal resuscitation, precision and timing are paramount, and the first minute offers a crucial opportunity to alter the course of a newborn’s life. 

Reference 

1. Boller M, Burkitt‐Creedon JM, Fletcher DJ, Byers CG, Davidson AP, Farrell KS, Bassu G, Fausak ED, Grundy SA, Lopate C, Veronesi MC. RECOVER Guidelines: Newborn Resuscitation in Dogs and Cats. Clinical Guidelines. Journal of Veterinary Emergency and Critical Care. 2025 Aug;35:S60-85. https://onlinelibrary.wiley.com/doi/pdf/10.1111/vec.70013 

2. de Abreu RA, de Almeida LL, da Rosa Filho RR, Angrimani DD, Brito MM, Flores RB, Vannucchi CI. Canine pulmonary clearance during feto-neonatal transition according to the type of delivery. Theriogenology. 2024 Aug 1;224:156-62. https://doi.org/10.1016/j.theriogenology.2024.05.022 

3. Murphy MC, De Angelis L, McCarthy LK, O’Donnell CP. Comparison of infant heart rate assessment by auscultation, ECG and oximetry in the delivery room. Archives of Disease in Childhood-Fetal and Neonatal Edition. 2018 Sep 1;103(5):F490-2. https://www.researchgate.net/profile/Madeleine-Murphy-2/publication/325372531_Comparison_of_infant_heart_rate_assessment_by_auscultation_ECG_and_oximetry_in_the_delivery_room/links/613bb37c01846e45ef3e328b/Comparison-of-infant-heart-rate-assessment-by-auscultation-ECG-and-oximetry-in-the-delivery-room.pdf