Why is he chattering his teeth at me?

[JayceeStar]

Most of you know my lovely boar Buddy, he's the softest, most laid back, cuddly pig ever. He was neutered on Wednesday and has been living inside since, but he's been allowed to talk to the girls and see them through the mesh.
Recently he's been chattering his teeth at me when I'm near his cage. Right now, I'm in bed and he's in his cage on the floor and he's doing it again. He's never, ever done this before. What am I doing wrong? I'm heartbroken, I know it means "go away", before the op he used to cry when I walked away

 

[clairelove]

he is saying these girls are mine... my Todd does this at me all the time lol

 

[flintstones]

Fred chatters at me when I don't give him his veg quick enough!

 

[mikulinek]

I'm not an expert on neutering but I imagine he's just adjusting. I'm soooo sorry for you as this must be awful at the moment. I'm certain he'll be back to himself soon, he probably just needs some time