I've never even tried. But Nebo, you've given me hope! Maybe I'll brave those mouthfuls of teeth & give it a try, Sherman's "fish breath" can be pretty overpowering sometimes.
I do give them raw chicken with bones occasionally to clean their teeth. Last trip to the vets, he told me Star has cracked several teeth chewing on something & suggested I don't give her any more bones. Hmmm, I thought chicken bones were soft enough, no? I usedd to gve them those large smoked beef bones once in while, maybe she cracked her teeth on those?