Sonic is such a great name, he looks so healthy, nice thick coat.
Been giving mine cherries for years with no bad effects, most of them see the stone as the prize in the middle. But do avoid peach and nectarine stones, they have amygdalin (cyanide) in the seed within the stone.
It's hard to find true facts about this on the Internet as some sites suggest that even cherry stones contain cyanide. I've never even tried my chipmunks with a peach stone, and won't be experimenting, it's just easier to remember to throw the stones in the bin. But the cyanide is in the seeds of the peach and nectarine stones, and from what I've read in very small amounts. Here's some more reading on the subject, but relating to humans:
http://www.ordinarynothing.org/blog/2006/07/how-poisonous-are-peach-seeds/
