Could it be ringworm? Here is a chart of various rabbit diseases:
(source):
http://www.pet-care-plus.com/exotic-pet-care/rabbit-care/rabbit-disease.htm
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Rabbit disease or disorder [/align]
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Clinical signs [/align]
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Treatment/Comments [/align]
Bacterial rhinitis/pneumonia
Sneezing; nasal and eye discharge; breathing difficulties; head shaking
Common in stressed rabbits; treat with antibiotics
Malocclusion of teeth
Excessive salivation; inability to eat; weight loss; lip lacerations
Trim incisor teeth every 2 weeks
Hairballs
Loss of appetite; abdominal pain
Treat using laxatives; surgical removal sometimes needed; prevent with brushing, hairball laxative weekly
Mucoid-enteropathy
Abdominal pain and distension; diarrhea; arched back; dehydration
Treath this rabbit disease with antibiotics to prevent secondary infection; replace fluids; high-fiber diet might help
Coccidiosis
Abdominal pain and distension; loss of appetite; diarrhea; jaundic; weight loss
Rabbit disease is associated with poor sanitary conditions; treat with sulfa drugs
Bacterial enteritis
Diarrhea; weight loss; jaundice
Treat this rabbit disease using a select group of antimicrobial agents
Bacterial dermatitis "sore hocks"
Moist, ulcerated skin and lesions on hind feet
Caused by trauma from wire floors; treat with antibiiotics; change environmental conditions
Ringworm
Hair loss; cursts on head, ears
Treat with antifungal medications
Ear mites
Head shaking; scratching at ears; crusts and scabs in ears; hair loss on head and neck
This rabbit disease should be treated with antifungal medications
Mange
Intense itching; hair loss on face, ears, genitalia
Very contagious to other rabbits; treat with safe insecticidal shampoo; ivermectin for tough cases
Pox viruses
Warlike growths on face, legs, and feet; swollen eyelids; eye discharge; subcutaneous lumps
Transmitted by biting insects; no treatment; wartlike growths usually regress on their own
Pregnancy toxemia
Loss of appetite; depression; seizures in pregnant or lactating does
Cause of this rabbit disease is unknown; high mortality; support with antibiotics
Uterine adenocarcinoma
Infertility; weight loss; loss of appetite; vaginal discharge
Common in older females; spay if not metastisized
Nephroma
Loss of appetite, depression; variable signs (associated with kidney disease)
Usually benign, yet affects kidney function