Oh, Shelley, this is all just so awful! Poor Sparrow! Poor you!
Is there anything in the cage he could have bitten that has a sharp edge? Maybe a toy his tongue could have gotten stuck on? I babysat a dog once that managed to cut his tongue open on a piece of rawhide, so even things you wouldn't think of normally could maybe be the culprit.
I really hope he heals up quickly, and gets back to his old self very soon.
Is there anything in the cage he could have bitten that has a sharp edge? Maybe a toy his tongue could have gotten stuck on? I babysat a dog once that managed to cut his tongue open on a piece of rawhide, so even things you wouldn't think of normally could maybe be the culprit.
I really hope he heals up quickly, and gets back to his old self very soon.