Convictions for animal neglect and cruelty have risen by a third in England and Wales, according to an RSPCA report.
There was a 33.8% increase, up from 3,114 in 2011 to 4,168 last year.
Noting it is possible for an individual to get more than one conviction, the RSPCA points out there was also a 15.7% increase in the number of defendants convicted.
The number of those found guilty of offences rose to 1,552 in 2012 from 1,341 a year earlier, the report, which was released to mark RSPCA Week, said.
RSPCA chief executive Gavin Grant called on judges to take these offences “far more seriously”.
He said his staff, volunteers and branches are “struggling to keep up” in their fight against “a growing animal cruelty crisis”.
Successful prosecutions relating to cruelty to small mammals rose from 97 in 2011 to 354 in 2012, while convictions linked to the treatment of farm animals rose from 22 to 49 in the same period.