The Gators play at South Carolina on Wednesday in the SEC opener for both teams.
Horford is a graduate transfer from Michigan. Over 13 games this season, he has averaged 8.3 points and 5.7 rebounds. Hodskins, a walk-on freshman, has played only seven minutes over four games this season.
With Horford out, Florida started sophomore Chris Walker, who is averaging 6.4 points and 4.1 rebounds.
“This is totally a coaching decision and has nothing to do with the university,” Donovan said, according to Gatorzone.com. “Our focus now is on this next game and playing with the guys we have here.”