A veterinary services provider accused by Chewy Inc. in an alleged scheme to divert digital sales of pet prescriptions blasted the online retailer Monday for using a New York state lawsuit to suppress competition from traditional veterinary practices.

The filing, from Maine-based Covetrus Inc. and its Weil, Gotshal & Manges attorneys, refuted Chewy’s claims that it had partnered with a New York City software firm to hijack animal medication sales to unsuspecting customers, and said that the suit had notably excluded veterinary practices that stood to lose the most from the litigation.