I need help with my crazy guinea pig! :D?

Your guinea pig is just having a grand old time, she is simply playing in bursts and most guinea pig do do this but when the owners are at work so they simply do not see it. I have no concerns about the running and shaking as i feel it is all very normal, What i do have a problem with is the lack of a voice, this could be he begging of an URI and should be checked out by an EXOTIC vet. just to make sure she is OK. Guinea pigs will hide the fact they are ill until it has reached the acute stages and it is almost to late to treat. This is how they survive in the wild, but it makes it very difficult to get them medical care in a timely manner. With all of that in mind i would most certainly have her checked out re her voice.