Covetrus (CVET) S-4 Registration of securities issued in business combination transactions

Exhibit 99.6

Consent to be Named Director

HS Spinco, Inc., a Delaware corporation, has filed a Registration Statement onForm S-4 and FormS-1 (including any amendments or supplements thereto, the “Registration Statement”) with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”). In connection therewith, I hereby consent, pursuant to Rule 438 of Regulation C under the Securities Act, to be named as a director nominee of HS Spinco, Inc. and to the inclusion of my biographical information in the Registration Statement. I also consent to the filing of this consent as an exhibit to the Registration Statement.

IN WITNESS WHEREOF, the undersigned has executed this consent as of the 18^th day of December, 2018.

/s/ Deborah G. Ellinger

Deborah G. Ellinger