Method One:
A fine-toothed comb can catch fleas stuck between its teeth while combing cats' and dogs' fur. Do not crush them; instead, stick them on adhesive tape or place them in soapy water to kill them. Crushing them will release tapeworm eggs inside the fleas, which pets might ingest by licking.
Method Two:
Thoroughly clean the house; missed fleas or those fallen on the bed must be completely removed with a vacuum cleaner.
Pay special attention to corners, edges of wooden floors, between carpet and blanket fibers, and clean carefully. If fleas still persist, hang insecticide boards or place insecticides under carpets and blankets. However, insecticide boards are not only enemies of fleas, but also harmful to humans and pets, so use them only temporarily in cases of severe flea infestations. Households with children, cats, and puppies are better off not using them.

Method Three:
Keep cats and dogs clean. Flea-specific shampoos and care solutions are used to deal with fleas that cannot be removed by combing. When washing, wet the fur little by little from the head, leaving fleas no escape.
Method Four:
For cats that dislike bathing, use flea powder.
Flea powder for both cats and dogs may contain ingredients harmless to dogs but harmful to cats, so use one specially made for cats. Separate the fur where fleas may hide—behind ears, abdomen, and the root of legs—insert your hand and sprinkle flea powder, then comb through with a brush. Apply once every 2-3 days; do not apply daily.
Method Five:
Take 250 grams of fresh citrus peels, chop into small pieces, wrap in gauze, and squeeze out juice with a sour and bitter taste.
Dilute the juice with 500 grams of boiling water and stir evenly. After cooling, spray it on cats and dogs, or soak a towel in the diluted citrus liquid and wrap around pets. After one hour, all fleas on the pets will be dead!
Killing Fleas
To effectively exterminate fleas, it is necessary to kill adult fleas and control the flea growth environment.
Killing Adults
There are many flea products on the market with varied formulas, kill speed, effects, duration, and ease of use.
If a cat is allergic to flea bites, use fast-acting flea medications to prevent further bites.
Environmental Control
Vacuum frequently and immediately seal and dispose of the vacuum cleaner bag to greatly reduce the chances of immature fleas developing into adults indoors. Thoroughly clean or discard all contaminated items, including your dog's bed.
Additional measures:
1) Use long-lasting flea medicine on dogs or other pets with fleas to kill adults and prevent egg laying.
2) Treat the home to kill fleas in all life stages. This is difficult because larvae may reside deep in carpets and sofas. It can be time-consuming and costly since the entire house—including all crevices and corners—must be treated.
Vacuum before applying medicine to stimulate adults to come out of cocoons. Follow product instructions strictly to avoid poisoning.
Pay special attention to places where dogs frequently stay, especially their sleeping areas. Wash washable items carefully and sun them; discard those that cannot be washed.
3) Give all dogs medicine to inhibit flea development into adults.
However, these medicines do not kill adults.
Follow all instructions. Some methods take months to eradicate fleas completely.
Long-Term Flea Control
If all fleas, both adults and immature, have been eliminated, change the flea control approach. If pets do not go outside, no further action might be necessary.
If not, choose a long-term flea control product but use it consistently without interruption.
Flea Products
Sprays, powders, baths, pills, and more.
Sprays and powders have short effective periods; if fleas grow in the dog's surroundings repeatedly, fleas will soon reappear.
Dog collars have certain effectiveness periods and require timely replacement. Some say the collars' flea control range is limited, as fleas may live outside the dog's neck area. Quality of dog collars bought domestically varies, so choose carefully (an article on Lucky Local Cats website mentioned that active ingredients should be one of the following: synergist pyrethroids, synthetic pyrethroids, carbamates, organophosphates, or aldoximes).
Based on experience, domestic flea collars are not recommended, especially for puppies. Also, avoid using them if there is more than one dog at home to prevent dogs from licking the collars off each other. There have been multiple cases of dogs showing loss of appetite, diarrhea, and other poisoning symptoms after licking flea collars.
Bath treatments can only wash off and kill adult fleas on the dog but have no effect on eggs. Currently, two relatively safe and long-lasting flea products in China are Mie Chong Ning (domestic) and Frontline (imported).
Both work by applying drops to the dog’s skin, where the medicine rapidly penetrates beneath the skin producing low toxicity. Fleas biting the dog will be poisoned to death. Because the medicine lasts about a month, newly hatched fleas during this period are also quickly poisoned. According to domestic pet owners’ experience, these two are the most effective. However, Mie Chong Ning has strict dosage limits and should not exceed instructions to avoid skin allergies; it also cannot be used on puppies under three months or pregnant female dogs.
Frontline is expensive but very safe, suitable for puppies and pregnant dogs.
New Foreign Flea Products
Several new safe and effective products abroad are harmless to mammals, so they can be used on puppies.
Frontline (Merial) drops or sprays; sprays can safely remove fleas from puppies as young as two days.
This medicine kills adults.
Advantage (Bayer) drops kill adults.
Program (Novartis) prevents flea eggs from hatching. Administer orally once a month or by injection every six months. The medicine enters the bloodstream when fleas bite but doesn’t kill adults.

Staykil (Novartis) spray is used for environmental control to prevent larvae from becoming adults.
There are also hormone-like medicines that inhibit larvae development (Acclaim 2000, by Sanofi or Indorex, by Virbac), used for environmental control by spraying pet living areas, effective for six months to a year.
These medicines can also kill eggs. They are made into sprays and dog collars used to kill fleas on dogs.
Suggestions
Traditional flea medicines easily cause dog poisoning. Some flea medicines for cats are toxic to dogs. Using multiple flea medicines simultaneously can cause chemical reactions harmful to dogs.
Be cautious when killing fleas. Inform the vet of all flea medicines currently used if your dog is prescribed additional flea medicine, other drugs, or anesthesia.
Prevent dogs from contracting fleas when none are present; if fleas appear, control them promptly but carefully!