An author is blasting Britney Spears and Paris Hilton for impulse pet buying in a new book, the New York Post's Page Six reports.

Karen Dawn, author of the animal-rights tome "Thanking the Monkey: Rethinking the Way We Treat Animals," chastises the pair for their pet menageries.

"We've already seen Paris go through dogs faster than mojitos, and I bet nobody warned Britney that California might soon force drivers to keep dogs safely restrained in vehicles — like babies," Dawn writes.

Spears has owned four dogs and a parakeet while Hilton has bought a handful of dogs, a ferret and an exotic kinkajou.

"An impulse purchase of a companion for the next 15 years? ... Nobody expects them to have the dogs much longer than 15 months," Dawn writes.

Click here to read the full report at Page Six

Meanwhile, a paparazzo filed a hit and run report with the Los Angeles Sheriff's Department in West Hollywood after Hilton's boyfriend Benji Madden allegedly ran over his foot while Paris was in the car as a passenger, TMZ reports.

As photographers swarmed the car, a loud yelping sound can be heard in the TMZ video as Madden allegedly drove over one lensman's foot outside Foxtail nightclub. After the alleged rollover, Madden checked out the situation and took off, TMZ says.

Click here for the TMZ report and to see video