Absolutely do NOT use ivermectin. An ivermectin injection can easily go wrong, and you will end up with a dead hedgie. Read this sticky made by Nancy: http://www.hedgehogcentral.com/forums/viewtopic.php?f=5&t=6
The safest route so far, is by using kitten/cat Revolution.
Dosage can be found here: http://www.hedgehogcentral.com/forums/viewtopic.php?f=5&t=2628
And it would be better to go to the vets. Please bring both hedgies to the vet asap to get them treated. While there are "home" remedies, Revolution has been tried, tested and deemed safe.
The safest route so far, is by using kitten/cat Revolution.
Dosage can be found here: http://www.hedgehogcentral.com/forums/viewtopic.php?f=5&t=2628
And it would be better to go to the vets. Please bring both hedgies to the vet asap to get them treated. While there are "home" remedies, Revolution has been tried, tested and deemed safe.