i have a 10lb dog and a 40lb dog. does the product Program for fleas come in different sizes for different dogs? do i need to worry about side effects? they are always itching, i see fleas but baths, collars and spraying the house and yard are not working.
You have to buy the correct dose. You can give a 10 pd dog a 40 pd dose. Try program or frontline plus. vetcare