I use it on my goats and chickens for lice and mites. It works by cutting the exoskeleton of the insect so that it dries out.
Lemongrass, Peppermint, Eucalyptus, Cedarwood, and Lavender all help to repel or kill fleas naturally.
Apple Cider Vinegar works both externally and internally to repel fleas- with the added benefit of improving your pet’s skin and coat.
A flea trap can be bought or homemade, and very simply it’s a light shining over a pan of soapy water.