“we are located in the north eastern region of US & used this collar on all 4 of our dogs (2 smalls & 2 large) for the first time last year (summer 2017 thru fall & winter). The collars did exactly what they claim to do, no fleas no ticks on any of the 4 dogs. These collars are not cheap but you get what you pay for and I find them to be very effective.”
“Will need to cut the large down to fit my 20# Mini English Golden Doodle since the small will not be large enough. Would be nice to have a MEDIUM in the SERESTO collar. Reason for 4 star is the waste necessary.”
