You may want to be careful about the acorns. They contain tannic acid which is poisonous and can cause vomiting, diarhhea, etc. I think these symptoms occur when large quantities of acorns are ingested, but you might want to discourage Wrigley from eating them anyway.
Easier said than done though, I know! Half of our yard is covered in wood chips and Boo used to eat them like they were going out of style. :x Drove me nuts, I had to watch him like a hawk, and was always yelling "No eat!" :?