My advice would aways be don't treat for what the dog hasn't got, wormers are not good for the dogs anymore than spot ons and other treatments, and cause issues that may not be apparent for many years. Worm count and treat if nes, after all would you take tablets from your doctor without tests to find out whats wrong with you? Vets push wormers, vaccines etc all the time, many patently unhealthy to say the least, in 40 yrs of Cocker ownership I have never had boosters or used wormers. When I had the wormcount done on my 9yr old bitch after no wormers (or tests) for 9 yr she had no worms, so why waste money and dogs health. I f I find them as I have in my new dog, I will use a non chemical treatment