While we were in Oregon visiting my wonderful family, my grandma picked Mercy up some teething biscuits. I was not optimistic. She hadn't really liked anything else we'd given her, but I figured we'd try anyways since Gram had gone to all the trouble of getting them for her.
She loved em.
These ones were EarthsBest Wheat Teething Biscuits I believe. They are kinda messy, but its totally worth it for all the cute pictures you can get.