I've used Frontline for years on both of my cats but the last couple of times I've used it on one of my cats it's left a big bald patch where I put it on.
I mentioned this to the vet but they said it shouldn't harm so carry on.
I switched down from frontline to the bob martins dropper type it was a lot cheaper, so far has worked fine and tinkerbella hasn't seemed so bothered by it....she used to try and get her tongue round to the frontline so I think it may have stung a bit
i stopped using frontline spray on my dogs because one of them became sensitive to it and came out in wet blisters where I had sprayed. The vet suggested scalibor collars which have pyrethroid insecticide in them. Our big problem is ticks, not fleas and so far, touching wood, they work better than the frontline
Thanks for your answers. I didn't realise you could use csj's billy no mates on cats. Maybe I'll give this a try or Bob Martins as I guess this maybe isn't as strong as Frontline.
I can't see any sign of fleas on any of my pets but want to have them covered before they go into a cattery.
One of my cats is alergic to frontline,could be the case with yours.Some vets will say that [keeps them in business].I use a herbal one from pets at home and it seems to work ok for him.