Two substances, aminopterin and melamine, have been identified in some of the tested samples of the recalled pet foods manufactured by Menu Foods (www.menufoods.com). How these substances entered the pet food chain hasn't been determined. Investigators also don't know whether these substances are the sole cause of the illness associated with ingestion of the recalled food; other as yet unknown factors are likely to be involved.
National Report — About 100 dogs perished due to aflatoxin poisoning, a naturally occurring toxic chemical byproduct from the growth of the fungus Aspergillus flavus on corn and other crops, according to Cornell University College of Veterinary Medicine.
Between 2002 and 2004, ASPCA Animal Poison Control Center (APCC) staff members consulted on 158 cases of moth repellent ingestion. In most instances, the exposure was oral, but dermal and inhalation exposures were also reported. Naphthalene was the active ingredient in 83% of the cases, and paradichlorobenzene was the active ingredient in 17%.