Thank you for the additional information.
I am sorry to hear that Moily has been infested with fleas. Fleas can cause significant itching in many dogs to the point where they can seriously hurt themselves. Fleas can be difficult to completely eliminate in some cases as the flea life cycle involves 4 stages. Only about 5% of the entire flea life cycle is on a dog. The rest is in the environment such as outside or unfortunately in the house. The good news is that many of the flea treatments and preventives today work quite well. Here is what I would recommend:
1) I would purchase a flea preventive/treatment such as Frontline Plus or Advantage II. These are topical medications that can be applied directly to her skin which should help kill all adult fleas within 24 hours that are currently on her. The flea collar that lasts 8 months called Seresto could also be considered if applying a topical is not preferred.
2) Treating the environment is very important. There are eggs
, larvae, and baby fleas that are not currently on Molly. Vacuuming the carpet a couple of times a week and treating the environment with a safe spray is a good way to help eliminate the other stages of the fleas. You can purchase a house treatment such as Virbac's Knockout spray:
3) Make sure that you also treat all of the cats and dogs in your house for fleas with the Frontline or Advantage even if you do not see fleas as the fleas can infest every animal making it harder to eliminate all fleas.
4) For the itching a cortisone type medication such as prednisone works best but this is only available from your vet. At home you can safely try Benadryl at a dose of 1 mg per pound every 12 hours. This does not always help with itching but is the safest an most effective home treatment for dogs.
Overall, A flea preventive should be used every month to help prevent future flea problems and also to help get rid of the fleas that you are currently seeing.
Hope this helps to answer your question - if not or if you have any more questions please feel free to reply by clicking on the "reply to" button. Thank you for your question.