To tell our hosts they have fleas

[AddToBasket]

I went to a friend's house on Saturday night for dinner. They have two dogs of their own and there was also another couple staying with a dog. So, three dogs.

After supper, we sat on the sofas with the dogs. I was wearing cropped trousers (big mistake). Got home and noticed a couple of bites, by last night I realised I was covered from the knee down. Like, chicken pox covered: I'd been flea feast.

WIBU to tell the hosts or should I stay quiet? It was a good evening, lovely food and guests, and they had gone to a lot of effort. But, OMG, there's no doubt the sofa throw is infested.

Deflect her with little tubes of gloop.

Yes,but which one. FRontline for example is ineffective. I think there are other shit ones too.

Frontline is not ineffective but like all medications you need to chop and change your treatments regularly as the fleas become immune to the contents.
There is Frontline, Stronghold, Advocate, Broadline (cats only)Fiprospot, Advantadge,Effipro,Capstar ( may only be US),Program,

But remember to change them around to get the best effective treatment

Say something. I'm a flea magnet, if there's a single flea it will bite me, so I've had to tell multiple people their pets have fleas! I'm sure they'd rather know than wait until the whole hose needs treating. I react worse to cat fleas than dog fleas. On the flip side, mosquitos don't like me, so that's good.

I suspect she knows. And will be embarrassed enough, so I wouldn't mention it.

thequeen it will be like bacterial - in fact antibiotic resistance. All to do with natural selection.
The bacteria are growing happily -there are a few that are resistant to an AB but most aren't. Because the ones that aren't resistant reproduce faster as they have an advantage (eg they don't need to make a bit of extra DNA). Then you expose them to ABs and the non resistant ones die - leaving just the resistant ones who then don't need to compete for food/space/oxygen whatever so become the dominant ones until the AB is removed then one without resistance will evolve and eventually over take the resistant ones.
So if the fleas are resistant to frontline you will end up with a house full of resistant fleas...however if you then change treatment that will kill them off - until the new treatment starts to become less effective as the fleas evolve so then you will end up with a house full of fleas resistant to that treatment - so you swap back to frontline and it kills them off...
However the danger is you end up with fleas that have evolved to have multiple resistance...and nothing works.
Personally I think we shouldn't be routinely treating pets constantly for fleas and all the manufacturers (and vets!) should admit they are evolving to be resistant instead of pushing the monthly treatments all year round.