The older the springer, then the more likely a stroke becomes. The symproms are much like those in a human being, and prevention is similar. There are drugs – I take aspirin every day to keep my blood thin and reduce the risk of clotting. Strokes do happen to dogs – you can find out more about prevention in this news story which I came across:
I have no association or link with the author, but he writes well about strokes in dogs.