I googled and found this site which gives side effects. One of the side effects is uncoordination and it says you should seek treatment asap! I hope your little one will be okay! Symptoms such as uncoordination and dilated pupils are of particular concern and can lead to death if treatment is not sought immediately.
Read more at Suite101: Ivermectin for Dogs: Usages, Safety and Side Effects of Ivermectin in Dogs
Ivermectin for Dogs: Usages, Safety and Side Effects of Ivermectin in Dogs