We had this happen with Laddy a couple weeks ago he was all pep one minute next collapsed beside me on the sofa and we couldnt get him to respond. We use nutrical and he came back to himself albeit slowly. He had an appointment the next day with the vet who advised us to add karo syrup to his water at least once a week. We have had poms in the past and did this with them but didnt know that we should do the same for our yorkie. It is very scary and like you I dont want to go through it again. Glad your baby is ok.