Nexgard Spectra Cats & Kitten Parasite Treatment

I recently purchased from Petstock. I love that fleas and a variety of worms are dealt with in one treatment and no longer need to get a worm tablet into my cat! The only thing I don't like is the residue that is left on my cats fur. She is a long hair ragdoll.

So far it legit prevented fleas a lot longer than any other treatment so far. But was also told sticking to the same treatment everytime like nit treatment you become immune to it so we tried this brand and was rather impressed... However like any flea treatment my cats seem limber as ever and seem to always lick at it and end up with a foaming mouth.. have been told it's not dangerous but to try stop them... Very hard when ya have two..

tried on my kittens and didn't attack or prevent worms but was great for everything else 9fleas,ticks etc.