Is he a cockapoo? I feel like I remember this. Anyway RG is so common with these fluffy beasts. If hes bitten I wouldnt be removing anything from him unless its life threatening. Removing with force will only reinforce the behaviour as he thinks youl take things from him.
If hes off lead and lifting things Id muzzle him so he cant pick stuff if he wont drop on command. Purely for his own safety because he could lift something that could kill him like chewing gum.
For now keep the house completely clear (appreciate he may not be picking up anything in the house) and swapping is the way forward. My oldest boy doesnt get balls anymore because he becomes fixated to the point his body is vibrating. He wont settle. He doesnt RG but it could certainly happen I reckon with balls
![Face with rolling eyes :rolling_eyes: 🙄](https://cdn.jsdelivr.net/gh/joypixels/emoji-assets@5.0/png/64/1f644.png)
if he knows there is one in the garden he will pant and whine and pace to get to it.
Anyway if he wont swap you just need to wait until he loses interest and lift it out of sight of him.
I know you wont but do not attempt to alpha a RG dog. It wont help. Swap swap swap.
My dogs love squirty cream so even the sound of it coming out they come running