Peppermint is a natural flea repellent. Wash the ferret laundry in the soap to inhibit fleas too. Vacuum every other day and use flea powder the first time to suck up and kill the fleas IN the vacuum cleaner. Do NOT use flea control collars on ferrets. Remove as much carpeting from the ferret play area as possible.
Fleas love to hide in carpet, furniture, etc.
Soap kills fleas. Signs of trouble - lack of appetite, rumbling stomachs, diarrhea, vomiting, salivation, dilated pupils, stumbling. You probably will not see them, but it is nice to know what to look for. US 1 South to Ten-Ten exit, left to Apex, left on Salem St., building on right. Park at Apex First Baptist Church.