The Natural Resources Defense Council has filed a lawsuit against pet product retailers and manufacturers for selling toxic pet products that are harmful to both pets and human without proper warning labels.

The lawsuit alleges the flea collars leave toxic chemical residues that can cause cancer and neurological damage to children.

“Just because a product is sold in stores does not mean it is safe,” said Dr. Gina Solomon, a senior physician toxicologist. “Consumers have a right to know if a flea control product could make their pets or families sick.

In a recent study, the council found high levels of propoxur and tetrachlorvinphos (TCVP) on pet fur after using flea collars.

The lawsuit was filed against 16 manufacturers and retailers including PetCo and Petsmart.