Bella and Jess are indoor cats and we've been treating the with stronghold every month, me and dh were discussing if its necessary with them being indoor cats. I think they need treating over summer but maybe not over winter hes trying to convince me they dont need treating anymore. I'm very cautious as our dd has allergies and when barney got fleas, dd got bit and she would swell up (she got bit on her forearm and an area the size of my hand swelled up,she was only just three at the time so a massive area for her size) so i think shes very allergic to fleas so dread the cats getting them. what do you think, what do people with house cats do??