Rex Ryan ate a dog biscuit for a cause. The Buffalo Bills coach was taking part in the Erie County SPCA Dog Biscuit Challenge to help raise money for the organization.

You remember the ALS Ice Bucket challenge? Well this works the same way. You nominate three people to eat a dog biscuit and if you don't -- you have to donate money to the SPCA.

"Oh, that's terrific," Rex said before he took a second biscuit, then noted it was a "little dry".

Rex challenged Sidney Pegula, who then challenged Terry. See who Terry challenged in the video below.