Medicines and other things are often tested on small animals. Being a guinea pig means things are being tested on you or are asking you to try something out.
depends on the ginea pig :)
Its a Boar.
guinea pig
Mess
Try carrots or fresh cabbage.
It can mean to eat a huge amount, more than you normally would.
Between 4-6 weeks
Females have smaller genitals and the males have a dot on them .
Guinea pig is not an idiom. It is a type of small rodent that is often kept as a pet.I have a pet guinea pig.
I suppose any thing is possible but I have never heard of it.
This is not an idiom because you can figure out what it means. When you see AS ___ AS ___ then you are looking at A Simile. This one is comparing someone who is happy to a happy pig in a muddy wallow, rolling around.
Appoxamately 2 months than she will have mini adult babies (( Fur and all ))