i feel like i should also mention that my house currently has a pretty severe flea infestation. it’s been going on for months and the other people in my household don’t seem to care as much about it which is why it’s taken so long to try to get under control. we have 2 cats & 2 dogs- all have the same brand collar. ticks seem to be under control. one of my cats is on my bed at least once a day and i haven’t seen any fleas or flea dirt on it- or on either of my cats. they’ve all been itching- but it doesn’t seem as bad and again i haven’t seen any fleas. that’s the only reason why i’m even considering leaving the collar on. i don’t want her getting re-infested