Girl kitten (I say kitten, she's almost 2!) has always done this but it's becoming more frequent and I'm a bit worried it might be an anxiety thing or something. She attempts to cover her food by 'digging' at the wall above her bowl, she gets in the (empty) bath and digs at the side like she's trying to tunnel out, she digs at the window while she's watching the birds and also various other places.
She's otherwise fine, eating well, toileting fine, coming for fuss as normal and seems happy and relaxed most of the time. We did have one weird incident last night, I was sitting on the bed stroking her and she attacked me out of the blue. It started as a fairly normal 'had enough fuss' bite but she really hung onto my hand and then once I'd extricated it started jumping at my shoulder and then my face/head. She was almost stalking me, kept staring with her pupils dilating and then lunging at me. It didn't look like play (I was actually a bit scared for a minute 
) and DH said she looked freaked out but she just seemed fixated and aggressive rather than defensive to me. I was sitting still, not attempting to touch her or anything so not posing a threat but she wouldn't stop til I got up and left the room.
She's been fine with me since, let me fuss her later on last night, came for her usual morning cuddle, all totally normal. No signs of pain or illness, no hiding, ears are cool etc and I'm normally pretty good at picking up when they're off colour, she seems fine otherwise. It's just the increased digging and the out of character attack, any thoughts?