Owners who fail to socialise and obedience-train dogs at an early stage are fuelling "frightening" levels of problem behaviour in their pets, according to the report.
Children should be taught at school how to be good owners in the face of research showing "fundamental" gaps in knowledge about animal welfare, the PDSA said.
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After sunny skies for many of us through much of the week, all change in the next 24 hours.
X Factor judge Rita Ora was booed for her decision-making during the show's Six Chair Challenge.
Samantha Hayes, 30, and her son Liam were last seen around 5.20pm on Friday afternoon.