Dreaming about guinea pigs can represent both independence and vulnerability. Be sure to give yourself the space and security needed for feeling safe when facing obstacles. There may be things that you want to get out of the way, a conscious self exploration is needed for the next area of growth. Constant support is seen as being present.
The guinea pig in dreams can also represent a competition you feel society pits you against, a burden that requires your unique way of solving difficult problems or the feeling of having to prove yourself. It may be related to your uncanny affinity with being subjected to experiments while you are frighten of failure.