Hope its ok for me to post on this bit as it's not actually a springer - but I think a lot of illnesses present similar anyway.
I met a lovely couple this morning with a 4yr old lhasa called Brodie (offered them a swap for my Brodie but they were not having it

)
Anyway, their Brodie has been having fits for the last 18months. They only happen two or three times a year, but are proper fits where he goes rigid and loses control of everything. Very distressing for them.
But the woman told me that just prior to them, he starts coughing and wretching as if he is choking. If they get to him quick enough and massage his chest, the fit is less severe. You immediately think a blocked airway - but would that cause a seizure?
He is not on any meds for it as it is infrequent and the vet can suggest nothing.
He does not get boosters or any other chemical treatments. To the best of their knowledge his littermates are all fine. But then the breeder could tell them anything
Any suggestions - or is choking prior to a fit sometimes normal?