I had a dobie that loved grapes. (I know, I know, no nutrition lectures. She dies 10 years ago anyway.) You could give her one and she'd just hold it in her mouth, like she wasn't sure if she should bite down or not. But she didn't want to put it down and risk the other dogs getting it, so she just held it. And she didn't want to squish it, so her mouth would be open just a little bit and she'd start to drool because she couldn't swallow! Eventually she'd give it back to whoever handed it to her in the first place. If you peeled the skin off, she ate it!