I would definitely take her to the vet, although not necessarily to have her put down. I would let the vet examine her to see what he/she thinks the problem could be and take it from there. Seizure disorders can be managed medically, it's not necessarily the end of the line just because she had a seizure. I would, however, definitely get the vet involved.
Ghilly
that would depend on whether or not the condition was permanent, there are meds to control seizures as long as she is going to be able to walk again..ths is something that needs to be discussed with a good Vet....fingers crossed for you both♥