Hi Dori, what is Sentinel, Ive seen it at Pet Barn behind the counter, is it a tabet??? I haven’t used no flea products this winter spring or summer on Patch.. as he gets sick from everything, I did use Frontline Plus but that was back in March, also I have a cat called Jeremy, & Jeremy brings the fleas home…he’s a big fluffy bath mat that comes home, whinges, eats then washes himself, flicks off any fleas, then scratches at the door to go back out…I do use Advantage spot on, on Jeremy monthly but he’s still always scratching, when I look I never find any fleas on him but like I said he’s a big fluffy bath mat, so 1 could be hiding, I dont think they have made a tablet for cats yet only the spot ons….
