Well Lucy is home.. the husband went and picked her up. The good news is that the vets didn’t find anything bad in her esophagus. It is definitely enlarged, thus the Mega esophagus… but there is no evidence of tumors or anything else bad. And the sphincter between the esophagus and the stomach is fine, too. They even put the scope in her stomach and looked at it that way too, and no sign of anything bad. So they didn’t use the balloon to make it bigger since it’s normal sized.
So the next guess is maybe she has Myasthenia gravis. It’s an autoimmune disorder that can cause the weaking of muscles, and maybe that’s why her esophagus is loosing strength and isn’t pushing the food into her stomach anymore. Our vets are going to do an antibodies test for it… if that comes back negative, they are going to diagnose her finally as this being “idiopathic” which means, basically, that they just don’t know what is going on.
We’ll get the test results back for the Myasthenia gravis in about 7 to 10 days. It’s good that she is healthy otherwise… but still, I do wish we knew what was causing this collie’s Mega-E!