Is the guinea pig nervous?
Nah, they seem to get along rather well. The guinea pigs will even bump their noses against his when he puts his nose up to the cage. My other big dog they run away from.
My other big dog taught him this. My kids thought it was cute - "Hey, mom! Cleo's showing Max where to dig! Look, she's patting the ground with her paw until he pays attention."
Hehheh, yeah...
Not my fav dog, Cleo.
But, the good news is your yard may be spared the six inch deep holes that are all over my frakking back yard.
Unless you have a Cleo.
Or unless your puppy is an instinctive digger.
If that's the case, well, you have my sympathies.