The U.S. Food and Drug Administration on Tuesday released data from five-and-a-half years of laboratory testing on Chinese-made chicken jerky dog treats — products that received heightened attention in 2007 and late 2011 following upticks in the 1,000 consumer complaints written to the FDA regarding sickened or dead dogs who consumed the treats. The bottom line: After 285 tests on chicken jerky samples from around the country, the FDA still cannot determine what in might be harming dogs who eat these treats. Regardless, the investigation will continue and the agency is still receiving new complaints from dog owners, said FDA spokeswoman Laura Alvey in an email to Food Safety News. The data release follows mounting scrutiny of the FDA’s investigation, as Ohio’s Sen. Sherrod Brown and Rep. Dennis Kucinich have pressured the agency to prioritize the investigation and dog owners in at least eight states have filed a class action lawsuit against Nestle Purina, one of the treat manufacturers. Earlier this year, FDA officials inspected an unspecified number of chicken jerky facilities in China, but the agency has yet to release any further information on those efforts. At the very least, the data release shows that the FDA has been actively testing jerky treats since January 2007, but the data’s format makes the impetus behind each test unclear, said Phyllis Entis, microbiologist and author of eFoodAlert. While many of the tests appear to be conducted in response to consumer complaints, others appear to be related to testing done on pet treats linked to the melamine dog food recall of 2007. An unprecedented ‘Data Dump’ In a post on eFoodAlert detailing the ‘data dump,’ Entis called the release an “unprecedented” move on the part of the FDA, but questioned how helpful the information would be without more context: “The problem with it is that there’s no indication of which tests were a result of the melamine investigation, which were results of consumer complaints, which were routine surveillance, or why there were certain tests done to certain samples that weren’t done to others,” Entis told Food Safety News. The data show that some of the samples were tested for everything from Salmonella and E. coli to cyanuric acid and aflotoxins, but the available information gives little insight into how various tests were chosen for each sample. Along with that, the tests seem to be spread among six regional or municipal labs, as opposed to being led by one more centralized lab. On eFoodAlert, Entis attributed the lack of progress in solving the mystery to two deeper problems: There don’t seem to be enough resources being spent on the investigation, and there doesn’t seem to be a systematic approach to tackling the mystery. When asked to elaborate, Entis offered a number of critiques: There is no consistent package of tests run on each sample, so data appears spotty. The fact that 285 samples have been analyzed by half a dozen labs over more than five years – less than one sample per lab per month — speaks to the lack of resources focused on the task. “You’re not talking about an FDA central research lab getting involved. You’re not talking about a particular regional lab being tasked to this problem. It’s scattered,” Entis said. “There’s no systematic approach that I can see, looking at the results being reported — no significant amount of resources being focused on this specific problem area.” FDA trying new avenues Alvey, the FDA spokeswoman, told FSN that the information in the data release did not represent all of the testing the FDA has conducted, and that other FDA labs and collaborating institutions are working to identify the root cause of the reported illnesses. The FDA has several initiatives underway to investigate additional toxic substances for which standard methods are not yet available, Alvey said. If the root cause is found, the public will know and necessary recalls will take place, she added. Until then, the FDA cannot recommend a recall without finding tangible evidence of a contaminant. In March, the agency posted a government contract for a private laboratory to analyze the nutritional content of 30 dog treat samples, but the listing does not mean the FDA is handing off the investigation. The agency suggests dog owners who feed their pets jerky treats to watch for signs such as decreased appetite or activity, diarrhea or vomiting, and increased water consumption or urination. An FDA “frequently asked questions” page has been produced for dog owners concerned about the situation. Read it here. Solving mystery may take more creative thinking Entis provided one suggestion for how the FDA might, as she called it, start “thinking outside the treat bag.” From what she can conclude from the test results, Entis said the most promising lead might be an undeclared ingredient in 12 of the samples: a moisture-retaining substance called propylene glycol. While propylene glycol is on the FDA’s Generally Recognized as Safe (GRAS) list, it can be toxic at certain exposure levels. Knowing that, Entis wondered if propylene glycol may be reacting with other ingredients in a way the FDA has not suspected. Dow Chemical states that glycol may react with other products under heat or oxidation processes which could in turn produce unknown effects. What, Entis asked, might happen when jerky treats featuring propylene glycol are irradiated, as some pet treats are? “I’m no chemist, but thinking back to the melamine recall in 2007, it turned out not to be just a melamine problem that was making the dogs sick — it was melamine plus cyanuric acid,” Entis told FSN. When researchers finally combined melamine and cyanuric acid under the right conditions, they finally figured out was sickening dogs. Similar tests might need to occur this time around to discover the jerky treat problem, where five years of dead-end tests are beginning to suggest the problem might require deeper, more creative problem solving. In the meantime, few signs suggest that the complaints from pet owners will slow down. “What I’m trying to get at, using [propylene] glycol as an example, is that this is supposed to be very mildly toxic, so maybe the problem is not something as simple as a single component,” Entis said. “But if you don’t know what you’re looking for, you’re not going to find it. I think this is going to take returning to more fundamental chemistry and biology thinking.”

  • Mechelle Clark

    My name is Mechelle Clark, I lost my Rottweiler Mariah last November to these Canyon Creek Ranch treats made by Purina. My 4 yr old Frankie was also sickened by these same treats. She has since recovered and now I worry about future issues with her health. I now have sadly made many online friends who have needlessly lost their dogs since my losing Mariah, that never had to happen. We know that dogs are becoming very sick and dying after eating these treats. Its happening over and over.All over the country. I do not understand the FDA saying they need more proof. How many more of our beloved family members do we have to lose before you TAKE THIS SERIOUSLY??? The testing you have done that amounts to ONE test per month since 2007, including some tests being done for another issue is unacceptable to me! Families and children are losing their best friends needlessly. We who have lost our pets have worked very hard getting the word out so NO OTHER dogs must die.. I can tell you that countless numbers of dogs have died without their owners ever knowing what killed them, Or what made them so Ill or because the owners lack of funds to treat the illness. Had to be euthanized!! When is someone going to stand up and say ENOUGH IS ENOUGH?? When is Purina who CLAIMS to love our dogs going to say… Money is not worth the lives of our loved ones and STOP sales until we figure this out? When is Pet Smart,Walmart and Sams club,Target, Walgreens,Costco and all the other big boxes going to say, We will not allow our customers pets to be poisoned by treats we are selling? When is someone going to STAND UP AND DO THE RIGHT THING? Its too late for my Mariah, I cannot have my baby girl back and I cannot change the agony she went through or the nightmares I have had for months because I gave her those poison treats! But If I can inform one more person, Save one more dog, I will do WHATEVER it takes to keep people informed and tell my story so that NO MORE dogs have to die.. Obviously Purina only loves and cares about your dogs when they are counting their profits!! I hope everyone who reads this story will share it with everyone you know and ask them to do the same so we can each help save lives…

  • Still no answers….except to buy your dog’s treats from someone you can trust. The jerky dog treats I make have ingredients from local sources (my own backyard). There are no articifical ingredients, no additives just human grade ingredients. Proud to carry the Fresh From Florida label.
    Check out for more information on lamb jerky or beef stew jerky dog treats!!!

  • That’s unfortunate they have not been able to come up with the ingredient causing these problems. Like Darlene said, you have to stick to local stores that you can trust. These national brands, while sometimes cheaper, end up costing us more in the end when all is said in done. And in this case, it costs some lives.

  • Ted

    The one thing the FDA cant control is fossil fuel based glycerin being used in China. It accumlates in a Dogs Kidneys. Unlike vegetable Kosher Glycerin which is healthy and water souable. I did my own research while going to China in July. fossil fuel glcerin very in expensive and deadly to humans and pets. Please buy US made treats like those sold by Earth Animal in New England. They are a very reputable company.

  • James

    My jack russell was just put to sleep after 9 months of continual vet care. We completed tests ranging from blood work to spinal tap, MRIs to muscle biopsy’s. I am positive the problem started with the chicken meatballs from Del Monte the Milo brand. I just read the FDA findings and symptoms today and I was speechless. These tests were conducted by three different facilities and approximately 12 different DVMs. We tried everything possible to save her and nothing worked, the last tests were for hormone levels and they were no where close to explainable. This problem is very serious.

  • Dawn

    Meanwhile how about we attempt to get “CORPORATE”  at all the major pet stores to voluntarily remove the products that are known to be sickening and killing dogs.  I am drafting a letter and will post it on FB and will send copies to Purina and DelMonte.  I had the FDA at my house today taking an affidavit and I was interviewed on camera for a TV station in Miami so with these baby steps maybe we can make things happen.  I would love to get a grassroots support for stores that voluntarily take these poisons off their shelves.  My dog, Mika, died August 12, 2012 from eating the Canyon Creek Ranch YAM GOOD, duck filet wrapped yams.  It was two weeks of suffering and not a gentle death.  So unnecessary.