Dear sriramaking,
The goat breed which your neighbor breeding is sirohi,as per your description.
You have not mention the other causes that the goats were showing before they died.Like-do they have high temperature,if they were suffering from cold,having runny nose,shivering moments if any,stop feeding at all,staying alone in a corner,fatten stomach etc.
Generally the rapid death of a goat occurs mainly due to pneumonia,there are several types of pneumonia in goats whose classification depends on the symptoms in goats.
A goat suffering from any type of pneumonia must have to be treated within 12 hrs after showing the symptoms or it may get die if not treated,or even if its being improperly treated.
Goats suffering from pneumonia,must have to vaccinate immediately with inj.intacef Tazo 500mg,2cc avil or cpm,2cc bcomplex,2cc dexa methasone(if its not pregnant),injecting dexamethasone to a pregnant goat can cause an abortion.All the vaccines must have to be vaccinated under veterinary supervision.
Vaccinate the goats for P.P.R.,E.T,H.S and black quarter to avoid any further death like this.
There are lots of diseases in goats which you must have to be vaccinated them,before their epidemic,which are properly explained in my
project report.
Regards,
DR.Shaikh