Dear Joy, it seems that you have a massive flea problem. The general rules in flea fight is:
ïƒ¼ Bathe your dogs at least 2 days before applying the flea treatment as the skin needs to regain its natural balance of pH and oils. Topical products are distributed all over the skins surface by the fatty acids so this is very important.
ïƒ¼ Frontline Plus should not be used on dogs weighing less than 4 lbs or under 8 weeks of age
ïƒ¼ Treat all pets at the same time. Please keep an eye on them to ensure that they will not lick each other; ingestion of the topical products can cause serious adverse reactions.
ïƒ¼ Treat each pet with the correct version of the product. Make sure the whole quantity of solution is deposited directly on the skin in a place where it cannot be licked off. If there is too much solution it can be applied in two spots.
ïƒ¼ Please read the information provided with the products. Please follow the indications of use in order to get maximum effect following treatments. It is important that all the suspension is placed directly on the skin and not in the coat.
ïƒ¼ Do not let your dogs swim for two days after the treatment. Bear in mind that frequent swimming will reduce the efficiency of the topical products.
ïƒ¼ In cases of high flea numbers, treatment of the environment (house/yard) is recommended. Products with insecticides and insect growth regulators are desirable as they help in reduction of the flea’s numbers. Environment treatment should be done at the same time as the pets’ treatments, they should be repeated twice at time intervals of two weeks and then whenever the flea numbers rise again. Do not vacuum or wash the floors for two days after the treatment so that the product has time to disperse and act.
I am hoping this will help and I wish you and your dogs a pleasant summer! Without fleas!