We took Ben for a short hike this afternoon. Fall has fallen around here, and so have thousands of acorns. For some reason he got interested in the yellow (not quite ripe) ones and started eating them as we walked. Telling him to "Leave it!" worked about half the time, but not always. Some he chewed on and spit out, but I know he swallowed some as well. Will they just pass through or is he likely to get sick?