In the US one can buy Ivomec over the counter for cattle and you can figure the correct dosage on line or on this site. One can also buy Ivermectin on line from Australia if one does not want a large quantity such as the liquid Ivomec cattle wormer.

I have ordered it from this Australian web site and had it sent to me in the US pretty quickly --

http://www.pets-megastore.com.au/vet...5_160_309.html

Not sure if they ship to Indonesia or not but you can check it out. With only one dog you would buy the tablets for the right weight for your dog and it gives the dosage size.

Hope he is doing better and continues to improve.