KYS,

Yes, that's a very good book on dog behavior. I really like
reading anything relating to animal behavior and dogs in
particular.

I really don't think this is an "old wife's tale". This period in
developement is sometimes called critical phases, or sensitive
phases in canine developement. Canine research into the
various stages of growth & mental development have been
going on for 40+ years. Here are two links to articles that
touch on the subject I mentioned.

http://www.k9events.com/puppies.htm

and http://www.napgs.com/ppaws/essay.html


I just wondered if anyone noticed such a phase in their pup.