The third-year player said the dog was stolen from a friend's house and he has been contacted by the perpetrator multiple times with demands for money.
Whitehead got the pit bull in May and has spent the past few months sharing pictures and videos of Blitz on an Instagram account for the dog. The most recent video was posted on the Fourth of July.
The 25-year-old receiver was an undrafted free agent out of Florida Atlantic. He has seen limited playing time on offense, grabbing nine catches in two years, although he has been an important contributor on special teams.
Per Spotrac, Whitehead is set to make $615,000 in base salary this season in the final year of his initial three-year contract.