Diagnosis is best left to a vet, yet with time and experience you may come to readily recognize a fleabite allergy. The dog may continue to itch for days after the fleas are removed from its environment, yet its condition will improve with time and the absence of fleas. As a groomer, you should familiarize yourself with various types of flea control in order to serve your customers as well as properly administer the application of insecticides. I pity the poor animal with a tick infestation, yet I will not subject my staff, my clients or myself to the possibility of infection. I am, herein, referring to the neglected backyard pet that the owner drags out of the yard every year or so in order to bathe.
Carbamates are more toxic and last longer.
Organophosphates are most toxic. The aforementioned are usually found as ingredients in dips and sprays. For your own safety as well as the pet's, I personally do not recommend usage of either carbamates or organophosphates. I have successfully killed fleas for years using a pyrethrin dip. Keep in mind that the directions for use always state that the pet should be air dried, yet this is not always possible due to fluff drying and styling.