Changing the rules so you can call it a success
This article has a lot of numbers and figures. It concludes, based on those, that a pit bull ban was successful:
Statistics show that calls for stray pit bulls are down from 186 for all of last year to just 23 as of last week, a drop of 86 percent.
Meanwhile, 67 pit bulls were removed as illegal, up from zero last year, before the law took effect.
The statistics, compiled through Sept. 27 by Animal Control Supervisor John Holmes, showed 99 pit bull-related calls logged at the animal shelter, vs. 100 for all of last year.
Holmes said there are now about 148 pit bulls registered in the city, compared to about 45 last year.
Another 32 pit bulls, whose owners did not register or insure their animals or place them elsewhere, were euthanized by a veterinarian
Everyone of those numbers is useless. How many bites were prevented? How many owners of dogs that attacked someone were prosecuted? Answer the questions that matter. I read the article twice for bite info. I found the number of bites last year but not this year.