102 isn’t a a fever. How much garlic?
I wouldn’t use LA200, I wouldn’t use any antibiotic yet. And surely a better one instead of LA.
First we need to go through a whole lot of questions.
What color is the discharge?
How old are they?
When does the cough happen? (further questions regarding this in more detail below)
Is it wet?
Does it sound like there is mucus?
Is there any raspy breathing or wheezing?
How often does the cough occur?
What is the duration of each cough? (multiple coughs at a time, just one short cough, one longer cough, a coughing fit, etc.)
Does it get worse when running, chewing cud, or eating?
Are there any dusty conditions, especially in hay or feed?
Is feed and hay free of mold?
What are your current/recent weather and pasture conditions? Wet pasture, warm and rainy, or cold and dry, cold and rainy, etc.
How long has it been going on for?
There’s a lot of possibilities. If there is raspy breathing, could be pneumonia. If the nasal discharge is clear, or if there is clear eye discharge as well, it may be as simple as an allergy.