A widespread contamination of pet food has been linked to the deaths of several dogs and cats and thousands of reports of sick animals throughout the country.
What's said towards the very end of the article:
...Officials said the FDA has received 17,000 reports of pets that owners believe were sickened or killed by contaminated food. About 8,000 reports, roughly half of them involving animals that died, have been formally entered into the FDA's tracking system for further analysis.
Roughly half of 8,000 is roughly 4,000 dead dogs and cats, or roughly a quarter of those sickened.