Just do a little bit at a time, at the same time every day and they get used to it. I get my three out every morning before their breakfast for a cuddle, Thea first, then Misty and finally feisty Miss Bramble. Usually, Bramble will only let me untangle a little bit and other days she's fine with a full untangle. If she's in the mood for "you're not combing me today Slave, think again, I has teeth you know!" I only do a little bit and then carry on the next day where I left off. All three of them always get Coriander after a cuddle/untangling session. Then they have their breakfast in the run. Bramble is quite good at letting me cut her fur with scissors (have yet to try the all over Grade 4 Bikini Bod with the clippers).