Aim 1: Evaluate relationship between canine proximity to the train derailment and increases in chemical exposures in combustion products. Hypothesis 1: Canines who live more proximal to the train derailment have higher levels of the TD-CP.
Aim 2: Evaluate the relationship between canine proximity to the train derailment and occurrence of cancer. Hypothesis 2: Canines who live more proximal to the train derailment will have higher rates of cancer.
Exploratory: Survey additional rates and risk of health/disease (ie respiratory, integumentary, reproductive, and/or endocrine disease) outcomes