08/15/2024
An unqualified trainer recently created a video recommending that you let your puppy 'cry it out' in a crate. This is incredibly damaging advice that will not only damage the relationship you share with your puppy, but also cause more behavioural issues in future. How do we know this?
Despite the fact that dogs progress through developmental stages much quicker than humans, puppies experience similar emotions and developmental stages to that of a human baby. Research continues to reveal that dogs are a sentient species and that their brains respond to stimuli, such as stress, in the same way as our own.
Rat brains are often used to research how mammalian brains work. In one such study, it was found that there is a critical period for switching on genes that control anxiety for the rest of the animal's life. If the rat offspring experienced a low nurturing mother in the first 10 days of life, those genes never switched on, resulting in that offspring being anxious for the rest of its life. The same mechanisms are found in the human brain, whereby the caregiver has the ability to influence genes, depending on the care they provide. Scientists have also revealed that there are actually hundreds of these genes influenced by nurturance. Thus, this study revealed that the care provided during infancy, has the power to influence the mammalian brain's ability to manage stress and anxiety. (Michael Meaney and colleagues; e. g., Meaney, 2001).
The argument that "letting puppies cry it out will help them develop resilience", is disproven by scientific research. Studies reveal that human babies left to cry don't self-regulate in isolation. "If they are left to cry alone, they learn to shut down in face of extensive distress—stop growing, stop feeling, stop trusting" (Henry & Wang, 1998). In comparison, when a baby is consistently comforted when they are distressed, they begin to expect to be soothed, which then contributes to the baby's future ability to self-soothe. Therefore, responding to a baby's distress helped them develop more resilience in future.
Other studies show that babies left to cry it out, have a tendency to become insecure, aggressive, bad tempered and more demanding. In fact, the extreme distress occurring as a result of prolonged crying, is even believed to cause significant damage to neurons in the brain. (Darcia Narvaez Ph.D)
During infancy, the brain is developing quickly, thus when the baby is distressed for long periods, it creates conditions for damage of the synapses. Cortisol (the stress hormone) is also released, which when in excess, can destroy neurons in the brain. Prolonged stress can also begin to impact the infant’s immune system, for example, prolonged distress in early life can result in a poorly functioning vagus nerve, resulting in conditions such as irritable bowel syndrome. (Stam et al, 1997)
Study after study reveals that lack of care and leaving a baby to cry negatively impacts the development and resilience in a variety of mammalian species. ( Don't forget a lot of what we know about the human brain is from studies of other mammals rather than humans.)
We are trying to demonstrate that we are this puppy’s new family and surely we want our puppy to feel safe and loved. If they begin to feel more insecure because prolonged crying hasn’t gotten them the comfort they needed in the past, they will soon learn to escalate their behaviour in a desperate attempt for comfort. Thus, leaving them to cry can actually result in more behavioural issues, because our puppy now feels so insecure and anxious, they can’t cope being left alone.
“Caregivers who habitually respond to the needs of the baby before the baby gets distressed, preventing crying, are more likely to have children who are independent than the opposite” (e.g., Stein & Newcomb, 1994).
The same is true of puppies. Rather than thinking in turns of giving attention for the crying, we should be trying to prevent the crying altogether by ensuring we always respond to our puppy’s needs. Crying is the first form of communication puppies develop and its indicative of a need and we took on the responsibility to address that need when we brought them home. So, it is very unfair to decide we aren’t going to respond to the crying, when it is us that decided to bring this baby into our family.
From these studies, and many more, we can conclude that forcing independence on a puppy can often lead to greater dependence on you. - Holly Leake ©
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References
Darcia F. Narvaez Ph.D. 2011
Henry, J.P., & Wang, S. (1998). Effects of early stress on adult affiliative behaviour, Psychoneuroendocrinology 23( 8), 863-875.
Meaney, M.J. (2001). Maternal care, gene expression, and the transmission of individual differences in stress reactivity across generations. Annual Review of Neuroscience, 24, 1161-1192.
Stam et al, 1997
Stein & Newcomb, 1994