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My 12 yr old, 55 lbs., Britney Spaniel/Retriever mut mix, ate a can of ready made chocolate icing at some point on Friday.  Saturday she had loose stools but that was the only symptom.  Today, Sunday night/Monday morning, she has been acting anxious, although she finally seems to have settled down.  If this is a reaction to the icing, can she recover on her own or will she need vet care?  Of course, this is a holiday weekend and we have no emergency vet in our area.  What is the timeline for symptoms and recovery?  Any input would be greatly appreciated.