From the company's press release:
On Monday, New York State's Department of Agriculture informed the U.S. Food and Drug Administration (FDA) and the Company that trace amounts of residual antibiotics had been found in several lots of Milo's Kitchen® Chicken Jerky. After consultation with the New York Department of Agriculture and FDA, the company decided to voluntarily recall Milo's Kitchen® Chicken Jerky and Chicken Grillers, which are both sourced from the same chicken suppliers.
The use of antibiotics to keep chickens healthy and disease-free while raising them is standard practice in poultry production for both human and pet food. However, the antibiotics found in the products were unapproved and should not be present in the final food product.
The full release, which includes contact information at the company and directions on how to receive a refund, is here.
UPDATE: Purina has recalled its Waggin Train and Canyon Creek Ranch treats, citing antibiotic residue as well. They also issued a statement insisting the products was safe, despite traces of antibiotics that are not approved in the United States. The treats are made in China. Read more here.
UPDATE: Publix Chicken Tenders Dog Chew Treats, a private label brand sold in the South, have also been recalled for antibiotic contamination. Read more here.