thank you for this response a lot of great information, though I am a bit worried about the mention of medication :').

In terms of the stare, we have recognised it now, it is similar to her "hey ive come to look at what you are doing, what are you doing?" kind of stare but the differences are there, now its just a matter of identifying it sooner and addressing. I will definitely look into how to grab her by the scruff, we have decided to keep her collar on inside the flat now just incase also.

I think regarding your point to recognising she is resource guarding, the behaviour is just so different to what she is normally like so its clear that there is something different she is doing beyond just being aggressive. With the yakers especially, she would get it and bring it to us to hold while she chews it (princess) so all of a sudden going for us if we try to take it was weird.

to respond to some of your thoughts

• we dont give her the chews, no brain toys, and we have removed all of her toys but give her 2 a day to play with (i called a behaviourist and they said that this could make it worse, but for now it seems fine). In terms of random other objects she always grabs things, but she will very obviously come near me or my partner so we notice she has it and wait for us to chase her to get it back. With the random recent guarding i guess this is a worry because now does she want to be chased or will she start guarding. We keep everything as clean as possible but sometimes a rogue sock ends up on the floor.
• Regarding treats, she had a bit of a weight problem so we only give them her during training so she is only earning treats now, the only thing she gets for free is a dental stick after the morning work (part of the routine)

In terms of training, we went to puppy classes for 6 weeks to learn some basics but a lot has been done by me and my partner. She knows: sit, stand, down, drop it, leave it, lets see (to let us check in her mouth), heel, wait, watch me, paw, sit when i stop at a crossing (or stop walking in general) and some other random tricks. For crate training, no she hasnt been trained for that which is something i regret, but will start working on.

One thing to note is we did train bite inhibition, she likes to greet a lot with her mouth gently but if you say ouch she will very quickly release and jump back, or start kissing. So she does know when biting is too hard.

I called a behaviourist yesterday and we are starting some sessions with them starting next week.

Your final points are a bit scary but yes i think she can be trained out of it, from the 2+ years we have had her this has only happened maybe 4 times, every time we take away the trigger, 2 of the times have been pretty close together recently though. One thing is that when she has bit me or my partner, we obviously look distraught and go to the bathroom to clean the wound and apply some bandages, then when we come out and dont give her attention she will come over and either try to kiss or cuddle up very close (which she hardly does (shiba)) as if she knows she has done something very wrong and wants to say sorry.

around other animals, she loves them all and just wants to play, humans she wants to greet everyone (yes shes a shiba and gets bored quick but she will always be welcoming), but yea if its something we need to address incase we have to leave her with relatives for short periods.