Is there a fear that these children might never fully grow up – be permanently obedient – and unable to move on to live healthy independent lives? Perhaps there is a danger that these methods could be misused and abused by malevolent adults. But the reality is – as the programme showed – that many current child-rearing methods, such as “crying it out”, may be equally or more damaging.It looked as though Haffenden’s interventions offered these children, and their parents, the possibility of a happier, more loving and contented family life – which I would have thought is the foundation stone for a happier life in adulthood.Celia UrbachLondon
• I did not agree with Chitra Ramaswamy’s review. The learning procedure the trainer was using was classical conditioning, which was first developed by Pavlov on dogs and later transferred for use with people. Each “behaviour”, whether it is a baby or a dog, can be acquired by positive reinforcement with a stimulus, eg a dog biscuit or half a milk chocolate drop, and paired with a simple stimulus, eg a clicker or, as in Pavlov’s case, a bell. Eventually, after a few pairings, the dog/child will respond to the simple stimulus only. I think the programme was stimulating and interesting and showed positive results without talking to the baby like a dog.Linda CollierOngar, Essex • In the late 1950s I overheard my recently acquired stepmother declaring that raising children was easy. It was, she said, just like training dogs, of which she had two. This of course explains why I can sit on command, walk to heel, fetch objects, eat my food from a bowl on the floor and go to the loo outside; and also perhaps why I became a psychologist and psychotherapist.Nick BartonHenstridge, Somerset
It pays to be a lap dog. Three dogs (from First Class cabins!) survived the sinking of the Titanic – two Pomeranians and one Pekingese.
• Join the debate – email [email protected] • Read more Guardian letters – click here to visit gu.com/letters
8 tips to make your dog happy
• Do you have a photo you’d like to share with Guardian readers?Click here to upload it and we’ll publish the best submissions in the letters spread of our print edition