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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HMS Enterprise assisted with saving more than 6,500 migrants off the coast of Libya on Tuesday.
Abu Muhammad Al-Adnani, cited as so-called Islamic State's official spokesman, was reported as killed in Syria by the group's media branch.
More cloud tomorrow with showery bursts of rain sliding southwards and eastwards through England and Wales.