I've had a good look through loads of different cat forums but can't find any posts that give an answer so I'm all registered for my first ever forum post!
My baby girl Mishka is an 8-9 month old semi long haired rescue kitty and we have had her since she was roughly 3 months old. She gets dedicated kitten food (wet and dry), lots of variety but all high quality, low grain food.
About a a week and a half ago she had some loose stools and did that skiing thing across the carpet. She has a super fluffy tail and we ended up having to cut some lovely crusted poo out of it (hope you're not eating right now!) as no matter how hard she tried, she couldn't get it clean. We could see her trying to bite out clumps of fur in addition to her rigorous licking regime.
I've been monitoring her litter box and results are varied-a few normal poos and I'm all like, yay, she's better, followed by a pancake then normal then runny yucks then normal etc. Because it seems okay for a day or so, not been to vet yet but booked for tomorrow after another unpleasant litter tray clear out this afternoon.
Issue is, in addition to the pooey bum, she has now started yacking hairballs at the rate of one a day for past three days. Before that we had only ever had one. I can't find any posts that have cats with loose stools as opposed to constipation and hairballs. But as always the internet has given me the fear when I typed in the two symptoms separately

She is still running around daft and happy for her daily grooming session including her tummy but sort of sighs in resignation when she realises it's tail time!
Eating normally and weight doesn't seem affected but as a fluffster it's hard to tell.
Question is-could the extra grooming have caused the hairballs or the hairballs caused the pooey bum?
I'm thinking we will probably be told to look at her diet, but I've not found sensitive tum or hairball food for kittens, only adult cats. Anyone have any suggestions? I'm in Scotland if that helps...
Oh and she is an indoor cat. Too young and silly to go outside so pretty much ruled out something untoward she has eaten. No christmas tree this year or other toxic plants and no human titbits that we are aware of.
Any help greatly appreciated x