I originally tried a flea collar on Oliver and it seemed to really irritate him - all he did was scratch it
... I've since switched to the liquid type of treatment that's applied on the back of the neck so he's less likely to be able to reach it when he's grooming...
I took the flea colar off last night. I searched her high and low for any case of fleas (why hubby put it on her I have no idea).... I think she just gets a case of the itchies every now and then. I threw the colar away.