Since this sounds like an emergency situation... Would it be better to dose with injectable Ivermectin because it would act faster than the Panacur? The reason I ask is because I had a similar situation recently and vet used injectable ivermectin and it worked. This is what happened.
When my baby 5 week old rabbit had symtoms of E.cuniculi, and I brought her to my vet she was completely floppy and could only move her ears and whiskers (I truly thought she was a goner) - my vet said- "We could get a test to see if its e. cuniculi but that would take days and this bunny wants to live!" Then he gave a shot of Ivermectin to kill the e.cuniculi (parasite) and a shot of Convenia (antibiotic) and a shot of a steroid. I left thinking.... all those injections into that tiny 350gm baby rabbit-- she's gonna die for sure
But she lived
arty0002: She was wobbley but sitting up the next morning- and by the next evening 24 hours later she was back to normal. Its been a month and I've dosed her again with oral ivermectin and she is still fine.
I later googled what my Veterinarian did and found Barbi Brown's web page on wry neck / e. cuniculi and if you read her "e. cuniculi treatment method" my vet did almost exactly what she recommends-
http://www.barbibrownsbunnies.com/ecuniculi.htm
---- Excerpt from Barbi Brown's rabbitry wry neck page-------
MY METHOD OF TREATMENT
I am convinced, based on my own experience, that Ivomec (a cattle wormer) is the key to stopping the migration of the parasite. Ivomec 1% injectable solution for cattle (given orally) paralyzes the parasite and stops the migration to the brain.
Ivomec 1% injectable solution for cattle given orally at the rate of 1/10cc per pound of body weight. Dosage repeated in 7 days. Then followed at 3 month intervals as a preventative. It is critical that the dose be repeated in 7 days at that appears to be the life cycle of the spore. We generally see improvement in the condition after the second dose of Ivomec.
Piperazine (pin worm medication) at the rate of 4 drops per pound given orally at the same time as the Ivomec. Repeat in 3 month intervals. This is to remove additional parasites that might compromise the immune system but does not effect the EC spores.
Steroid injection (Depo-Medrol, Cortisone or similar) at the outset in a single dose of 1/4cc per 5 pounds of body weight. This is only in cases of rabbits who are rolling. Repeated doses may compromise the immune system.
Antibiotic therapy to treat an obvious infectious condition that is suspected of being the original stressor. My drug of choice is Penicillin with Benzathene or Biomycin administered sub-cutaneously at the rate of 1/10 cc. per pound of body weight. This dosage is given every 48 hours for 3 days ONLY.
Probiotics are given if antibiotics are used.
THIS IS ONLY WHAT WORKS FOR ME AND IS OFFERED AS A GUIDELINE FOR YOU TO DISCUSS WITH YOUR VET AND USE UNDER THEIR SUPERVISION.