In my experience, it is better if they can cough up what they can. If they can't cough it up, pneumonia can develop. As I am not a doctor, I recommend calling your physician and see if he/she/they can offer any guidance.
I used to be a racist, but I don't have much interest in it since Dale Earnhardt got killed.
Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read.
Good judgement comes from experience; experience comes from bad judgement.