Donnell went through Wednesday's practice at Quest Diagnostics Training Center in 90-degree heat and intense humidity. He had an excellent practice and seemed fine in the locker room a half-hour to 45 minutes after practice. Donnell was spotted sitting at his locker talking to a couple of reporters. Shortly thereafter, Donnell was transported to the hospital via ambulance.
The Giants say Donnell is "recovering well."
No word on whether he will participate in Thursday's final practice of mini-camp.
Donnell is competing with Adrien Robinson, Daniel Fells, Kellen Davis and Xavier Grimble for the tight end role. Donnell beat Jacquian Williams deep on one play Wednesday and made an acrobatic catch on another ball.
The Giants wrap up mini-camp Thursday with a 10 a.m. practice. They are then off until players report for training camp on July 21.