You should take him/her to the Vet immediately. Potential issues could be a respiratory infection, like bronchitis and as severe as lung worm.
I think that it's mucus. but if you have a lung disease it could be that.
Yes its perfectly normal for mucus plug to be tinged Green or Yellow. Mucus plus means exactly that .. Mucus..
We may advise taking an expectorant when the cough is with mucus aor phlegm is coming out
the green mucus is snott thiko
This could be serious. A horse should not cough. It may have an upper respiratory infection. If the mucus is yellow or green, this may be the case and should be seen by a vet.
cause he's sick
Green mucus is green because of the colonising bacteria present in the lungs wherever the mucus came from. And we all know what the presence of bacteria can do to anything - make it smell worse.
Your goat could have an intestinal infection and may need antibiotics.
Clear nasal mucus or, "snot", is usually associated with allergies. If your nasal mucus is green or yellow you may have an infection and should see a doctor.
mucus causes green saliva>
it is green stuff inside your nose
stomach virus maybe ?