After more examination of my cochin hen "Meringue" I beleive she is impacted. Her croup is staying large all the time and she is more sluggish than normal. She also appears to have lost some weight. I can massage and move the contents around so from what I read should I go ahead and oil? How much oil can I safely give and is Canola Oil ok? I have syringes of various sizes so just need some instruction.