Hello All

A little bit about us. We bought our first bunny four years ago – a white Lion Head/Lop cross named Kimi. We immediately fell in love with his character and realized how rewarding rabbits can be as pets. When he grew up and we upgraded his cage, we thought he was getting very lonely and decided to get him a companion. This came in the face of Malinka – a brown unidentified as of yet breed (we’ve been told she has Dutch in her). She is the complete opposite of Kimi and they complete each other perfectly (after some challenging bonding). They have been living happily together for two and a half years now. Kimi has been neutered and Malinka spayed.

Now to the problem. Two weeks ago we came back from a two week long holiday during which Kimi and Malinka were staying at the usual pet carer where they always do when we are away. On the day they were brought back to us, we noticed something very unusual and scary happening to Malinka. As soon as she laid down on her stomach she starting making very fast clicking noises with her mouth and twitching her head diagonally upwards to the left. She is not in pain and she comes to her senses in about 5 seconds. This has been happening continuously since then – now 13 days. She only does this when she is relaxed and laying down. It doesn’t always happen, probably 50% of the time she is laying down.
We took her to our vets 11 days ago and during initial examination they found nothing. Her heart rate is ok, eyes ok and ears don’t have anything inside or out.
Apart from this twitch, she is the same old bunny as always – runs and jumps around, eats and drinks as normal and grooms her friend Kimi.
I have taken a couple of videos of her doing it, which I am going to share with you on the links below. I have also sent these to our vets who have agreed to forward them onto a rabbit specialist as they don’t know what it is either.
I would appreciate if you could advise on what this might be.

Video1 – twitch starts at 01:00.
Video2

Thank you for your help.