It does sound like what happened with my Chipmunk Pearl after she would have a seizure, she had something called Metabolic Bone Disease (MBD) a calcium defiency and it was bad, she would seizure almost every week sometimes more than once a week, gradually it reduced once we started treatment until they finally stopped but it was two months before she stopped seizuring, she made an almost full recovery and lived another two years.
When she had a seizure she would go into a completely unconscious state, i would find her at the bottom of the cage curled on the floor or in the digging container. Her eyes would be shut, her breathing reduced to just a few breaths a minute and she felt cold to the touch. As she came round she would shake and when she started walking she was very shaky, it took her about 30-45 minutes to recover from a seizure then she was completely normal. back to running and climbing, eating and drinking but she always looked very tired from having the MBD.
As Pinkpill said this could be Epilepsy but it could also be MBD. As long as your Chipmunks have a calcium supplement in their cage such as a cuttlefish bone or mineral block they shouldn't get MBD but seizures are a common symptom of this illness so just thought i should mention.
Hope he doesn't have any more seizures
