My eight year old hedgehog, Hedgie, has been having a few health problems as of late. A week or two ago, I heard him snuffling, and took him to the vet to be diagnosed with a URI (upper respiratory infection). He's since finished the antibiotics, but is still snuffling, but that's not the reason for posting today. Hedgie's left eye is halfway closed. The other eye is totally fine, nice and protrusive, like it normally is. He doesn't have any discharge from his eye or any other orifice (nose, mouth, etc..), it's just halfway closed. He's been like this for a few days and hasn't gotten better... Any ideas as to what this could be? Does this warrant another vet trip?