3 - Seems to be some grain/noise and the focus is off/perhaps some blur. Like to have seen the eyes sharper, a nudge rotate up on the right and variation of background.
The background is a little too distracting and for me, there is not enough light on the subject. Makes the details of your guinea pig just kind of blend in with the background. So the focus of the subject matter gets lost.
nice to see something besides cat and dogs but watch your backgrounds lots of distracting things, overexposed window light, book kithcen stuff distracts from real subject