So, we have two girl guinea pigs... and we have noticed that one of ours will approach the other one and make this low rumbling sound. She seems to be a little
more dominant, but it's something we hear quite often. Is this normal? I know that a male will make this sound to a female.. but I didn't know you
could also hear it with two female guinea pigs. Also, i don't think it's overly aggressive because they are very friendly with each other and the less
dominant one will steal carrots from the other one with no kind of confrontation.

