we have been using frontline for ages now for the cats and when we got T, we used it for him too.
This last month he has been biting himself and vet says its flea 
, even though we keep upto date with frontline.
Vet has suggested advocate, which i said i wanted to buy online (he seemed mightly upset by this comment) as its cheaper.
But he also said that its not the best for fleas, but covers lungworm and fox mange too, so he recommends it.
I know vets are paid by companies to recommend certain drugs so Im going to ask you wonderful ladies, what you would recommend??
tia