This is very serious, as you are likely aware. More information would be helpful, but there are several concerns I have. Did your vet every find a reason for the collapse? The collapse does not sound like an epileptic seizure, more likely, an episode of "fainting" which can be due to a heart problem. Does your dog have a heart murmur or enlarged heart? Did your vet do a chest x-ray or evaluate for fluid around the heart resulting in right heart failure? Was the liver small at surgery? The intestine thickened? Did your vet address these issues with you? If not, please ask your vet to refer you to an internal medicine specialist so you and your baby can get the answers you need and the help your pet deserves. I hope things go well,