i wormed Storm when i got him in April,The rest have not been wormed but i should do it now mideswell right?I have not noticed any worms in any of the others stool,But better safe then sorry,When my sister found her dog he had worms so bad he was throwing them up,Poor boy!Also it is so cheap to worm dogs when i had Storm done the vet charged me 10 cents a pill i could not believe how un expensive it is regardless my guys always get what they need.