Food agression

I had to quit the lavendel collar, I don't know if she hates the smell or the collar but she totally avoids it by moving away when I take the collar.
I'm going to a behaviour specialist tomorrow, to discuss medication as well. We have tried a lot in the last months but Lisbeth still have a problem to relax at home.
I have tried more and less activity, I gave her a lot to chew, mental stimulation and all this things. But Lisbeth can only relax when nothing is hapenning around her.

And since two weeks we have a new problem. Ressource guarding! I have started to feed Lisbeth only out of the Kong and for search for treats and by something to chew. Maybe it was a little bit less as well, because I wanted Lisbeth to loose some weight. But this was an awful idea for her! Now she is growling when she is chewing and someone comes too close. Till now the foodbowl is full all the time again. Lisbeth needs to know again that there is always food and that she do not have to protect it! Food agression is something natural! It is by instinct. So never ever take away some food from your dog. If your dog trusts you you can take away the food but always give something better instead or give the food back!