Casey, glad to hear your puppy turned out OK and that you acted promptly!
No, I had not known that our 5-year old dog had consumed the horse chestnuts. The vet began speaking to us about the escalating tests (and escalating costs) to try to rule out various potential causes of the seizure. We brought her home for the night, and when we arrived home, our 8-month old dog had vomited extensively while we were gone. The vomit was full of horse chestnuts at which point I immediately googled horse chestnut toxicity and became educated.
I'm thankful that the puppy tipped us off to the cause... but since our 5-year old dog had never had seizures before or vomited horse chestnuts, I'm thinking our 8-month old "showed" the older one to eat them.
