FLEAS - had all my creatures treated at vets, still have them HELP

[OnlyWantsOne]

On friday I payed over £50 for my dog and three cats to have front line combo sprays done - and today, still fleas on them

We've treated the house with RIP spray and hoovered and washed everything - vet nurse told us they would be gone by now :( What do I do? I cant front line them again apparently - feel like ive wasted my money

I think it can take up to 3 weeks for them to go after treatment , we have all most got rid of them after treating the cat 3 times and the dog twice (as well as spraying the furniture and floors).

I would wait another week and see if they have gone, you might need to treat them again.

We had the same problem last year and our cat had built up an immunity to Frontline and so we changed to Advantage and they all cleared up within days. I think it's quite common for Frontline to stop working. Good luck, it's miserable isn't it.

Are they big fleas or little fleas? If they are big, then the FL hasn't killed them, which is unlikely; if they are small then they are from the environment.
The flea life cycle goes egg-larva (like a little caterpillar) -pupae and adult.
The adults live on animals, all the other stages live in the environment- in your case, your house.
If you treat all your pets monthly with a good flea product-Advantage/frontline combo ( deals with immature stages in environment too), stronghold or advocate- you should avoid a household infestation. These flea products mainly kill the adults on the animal, before they have a chance to bite or lay eggs. Therefore you can stop the lifecycle. If you miss a month, or an untreated animal enters your house, you may still get fleas in the house.
When you have an infestation, it means that there has been a number of adults fleas on an animal that have been allowed to feed then breed. The life cycle of the flea is at the least 3 weeks, so it will take at least that long before you can expect all the pupae in your house to hatch. Sometimes it takes longer- the pupae require warmth and vibrations before they hatch. Without these conditions , they can last for a couple of years, just waiting!
Get a decent flea spray that kills emerging adult fleas for a couple of months AND contains an IGR ( insect growth regulator). This will make sure that any larvae that come into contact with it will never develop into cocoons. Flea sprays I would recommend include indorex and Acclaim or anything you can buy from your vet. RIP should do the trick too. Avoid Bob Martin.
Before you spray, hoover everywhere as enthusiastically as possible to encourage the pupae to hatch. Maybe turn on the heating, as this will help.
If you treat your pets, spray the house with a decent spray and hoover daily you will have many, many fleas the first 2-3 days, less for the next couple of weeks, and hardly any after week 3-4.
You just need to keep hoovering, move as much furniture around as possible and hoover everywhere the dog and cats go.

they are BIG fleas - plus, we move house on sat...

also, having carpets cleaned at old house - on monday

vet has suggested that i go to new house and spray carpets before we move in

I'd try something else if they are big fleas. Try advocate- you don't have to wait a month, just bung it on.
I have had quite a few clients say frontline no longer works for them.