Alexandra Horowitz
Design Matters with Debbie Millman
00:00
How Dogs Have Changed Over the Years
Puppies become much better at learning skills from other dogs or even humans after a certain age. Even free-ranging dogs tend to drift away from their mothers. Dogs can give birth twice a year, so they go into heat approximately every six months. While that mother dog is taking care of her litter, it's a full-time job.
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