Zack Bowman

Giants cornerback Zack Bowman missed practice on Thursday after being sent to the hospital with abdominal pain. (AP Photo/Matt Rourke)

(Matt Rourke)

EAST RUTHERFORD — The Giants injury-ravaged secondary received some more bad news today as cornerback Zack Bowman was sent to a local hospital with abdominal pain and missed practice on Thursday.

The Giants can ill-afford to lose another cornerback with starter Prince Amukamara placed on injured reserve yesterday and Dominique Rodgers-Cromartie still battling back and hamstring injuries. Rodgers-Cromartie rode the exercise bike during warmups, but later joined the rest of the defensive backs for individual drills.

Depending on the severity of Bowman's abdominal issue, the Giants could be left perilously thin at cornerback, with a banged-up Rodgers-Cromartie, the inexperienced Jayron Hosley and Chandler Fenner, and the recently signed Mike Harris and Chykie Brown.

There was some good news on the injury front, as defensive end Mathias Kiwanuka warmed up with the team but did not participate in individual drills during the portion of practice open to the media.

Left guard Weston Richburg, who was carted off the field on Monday night against the Indianapolis Colts with an ankle injury, participated in warmups and individual drills. Ditto for defensive tackle Cullen Jenkins, recovering from a strained calf.

Running back Rashad Jennings, still rehabbing his sprained knee, did some warming up with the team, but little else. Backup offensive lineman Adam Snyder also sat out practice with a knee injury.

Nick Powell may be reached at npowell@njadvancemedia.com. Follow him on Twitter @nickpowellbkny. Find NJ.com Giants on Facebook.