The (not so) blank slate: what the puppy brings to the table
The laws of learning apply to all puppies equally. Also, every puppy is different. Both of these things are true: sadly, things are rarely as black and white as we control-loving dog trainers would like them to be.
I was pretty certain my neighbors hadn’t done strategic socialization before the puppies left their nest. However, they likely grew up in a family environment, around young children, cats, ducks, and their dogs (apart from the dam, they have a small male that looks like a Miniature Schnauzer/Chihuahua mix). That’s a good foundation!
As soon as they were ready to explore, on their own time, they started venturing out into the alley with their mother, a little bit braver and further every day. This is one aspect of growing up free-roaming I love: it’s up to the puppies when they are ready to leave the nest, and how far they are willing to go. Their humans just let them be.
Out in the alley, they would meet passers-by and the occasional dog or neighborhood cat. They were also always able to retreat behind the safety of their gate, and had a mom who’d defend them fiercely against passing strange dogs (but not against known neighborhood dogs) until they were between 6 and 7 weeks old, when she intervened to a lesser and lesser degree.
There were five puppies, and this is how I see their baseline temperaments on a scale. Note that my scale only goes from the shiest to the most curious puppy in that litter. It is not a scale of all puppies, or of puppies in general.

The parents’ temperament and stress levels
We also know a little bit about the parents’ temperaments: the mother is neutral/friendly towards all people outside the home. She’ll bark briefly when someone enters her yard. She is neutral/friendly towards known dogs, and slightly suspicious of unknown ones. The father (assuming he is who I believe he is) is confident and mellow around all dogs and all people.
Genetically, this is a nice combination for a free-roamer or a pet dog: mellow and neutral, leaning towards confidence from the father’s side; no exuberance or red flag behaviors in the parents.
I don’t think either one of the parents has a particularly stressful life. They have lots of freedom, plenty of food, and a routine that rarely changes. This should result in a good in-utero experience for the litter. (Mothers who are stressed during the gestation period are more likely to produce pups who are prone to depression, anxiety, and social deficits. This is known to be true for rodents1,2,3 and assumed to also be relevant for other mammalian species such as humans and dogs.)
Two sets of experiences for Puzzle
I wanted Puzzle to have two sets of experiences: one set would prepare her for a potential pet dog life, and the other one would allow her to thrive as a free-roamer and scavenger. The second set was taken care of by the environment she lived in and the freedom she had. I focused on the first set. I wanted her to experience living inside a house, being left alone, being crated, mat work, walking on a leash, being in busy places with lots of people, being in stores, being handled and carried, being dog-neutral and dog-confident as well as people-neutral and people-confident, starting housetraining, getting used to traffic noises and other city sounds, being inside moving vehicles.
Not all of these experiences fall under the category of socialization – some of them are more general pet puppy skills. I also did not get through all of them while I had access to Puzzle. However, I think we did pretty well, given the fact that we only had a few weeks together. The aspects I’m going to focus on in my next two posts are socialization to dogs, and socialization to busy urban spaces/feeling neutral and confident around strange people.
Sources
(1) Weinstock, Marta (2016). Prenatal stressors in rodents: Effects on behavior. Neurobiology of Stress, S2352289516300133–. doi:10.1016/j.ynstr.2016.08.004
(2) Cabrera, R.J.; Rodríguez-Echandía, E.L.; Jatuff, A.S.G.; Fóscolo, M. (1999). Effects of prenatal exposure to a mild chronic variable stress on body weight, preweaning mortality and rat behavior. Brazilian Journal of Medical and Biological Research, 32(10), 1229–1237. doi:10.1590/s0100-879×1999001000009
(3) Soares-Cunha, Carina; Coimbra, Bárbara; Borges, Sónia; Domingues, Ana Verónica; Silva, Deolinda; Sousa, Nuno; Rodrigues, Ana João (2018). Mild Prenatal Stress Causes Emotional and Brain Structural Modifications in Rats of Both Sexes. Frontiers in Behavioral Neuroscience, 12, 129–. doi:10.3389/fnbeh.2018.00129