Dcat is 5 ish and we got him as a rescue about 9 months ago. He's officially listed as a BSH but his hair is a bit longer than "short" if that makes sense. I've been brushing him about once a week with a furminator (actually a dog furminator, because we already had one). He loves it and it seems to get a decent amount of hair out but he's still getting small clumps, mainly towards the back end of his back, which are then quite difficult to get out. I tried with a comb last night and it was obviously pulling quite badly and he even swiped at me which is totally unlike him 
. Does anyone have advice either on what sort of brush is best for regular grooming (NB we also have a bog standard cat brush but the bristles seem to be too far apart to do anything at all), or how to get out the clumps that have already formed? Thanks!