We have a pet rat and my son also did this, he is 1yr old. Poison control told me to clean him up really good, brush his teeth and watch him closly for the next few hours. But not to induce vomiting. If he seemed to be getting ill to take him to his pediatrcian. He is perfectly healthy, didnt grow a tail or anything.
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He does enjoy cheezits though, uhoh...lol! :)