Is this normal?

[*Piglets-Angel*]

Hi, I just introduced my new piggie to my other piggie, and they seemed to do good, they are sharing some veggies right now, but when I just first inrtoduced them I put them in the bathtub with a tiny bit of warm water, and they were kind of like plucking at each others fur, a few times it looked like nipping, no teeh chattering, just fur plucking, good or bad?

 

[Denise]

Could be barbering.

 

[Slap Maxwell]

Grooming possibly- when I introduced two females, one groomed the other as a show of dominance. Now mine groom each other's ears.