By JoNel Aleccia for VITALS at msnbc.com

Nearly 1,000 dogs reportedly have been sickened by chicken jerky pet treats from China, according to a new tally of complaints from worried owners and veterinarians submitted to federal health officials.

The Food and Drug Administration has logged some 900 reports of illnesses and deaths since November, when it warned owners about continued problems with the products known variously as chicken jerky strips, treats and nuggets, a spokeswoman said.

Back then, the agency already had heard from 70 owners about problems ranging from vomiting and diarrhea to kidney failure and other serious ailments after animals reportedly consumed the treats.

Since then, complaints have mounted steadily, putting growing pressure on the FDA to solve the problem.

The agency sent inspectors earlier this year to Chinese plants that make the jerky treats, two Ohio lawmakers previously told msnbc.com. No results of those inspections are yet available, FDA spokeswoman Tamara Ward said Monday.

Despite repeated tests since 2007, FDA scientists have been unable to detect any toxin responsible for the animal illnesses, officials said. The agency has asked certain pet owners to send in samples of suspect treats along with their animals’ veterinary records.

Three top brands of chicken jerky treats were among those most recently cited by pet owners and veterinarians in complaints of harm, FDA records obtained by msnbc.com showed. They included Waggin’ Train and Canyon Creek Ranch brands produced by Nestle Purina PetCare Co., and Milo’s Kitchen Home-style Dog Treats, produced by the Del Monte Corp.