My guinea pig is four years old and she will be turning five in three months. Yesterday, it seems a switch had turned on internally. She has always been an energetic, fun pet, and she eats a ton. In these last four and a half years, i have met her dietary needs as well as provided her with vitamin c. She is very responsive to her cage mate, and to my family and I. She squeaks and reacts to every noise we make. It seems that yesterday morning she wasn’t herself at all. Her breathing is becoming labored and hacking, her fur is puffing, and she’s lost the strength she once had to chew onto any fruit or vegetable, even a pellet or hay. I’ve tried to hydrate her by using a bowl, spoon, and syringe. She will lick some of the droplets, but she soon becomes disinterested. She’s losing her balance, and, although she has been a healthy guinea pig throughout her life, it seems that yesterday she lost all of her strength and character. She has been unresponsive to most noises we make and the only responses she has are later than they used to occur when she was healthy. She doesn’t squeak to her cage mate, or chatter her teeth. She’s not talking to her at all. Today, i crinkled a bag, and she did perk up, but soon dismissed it. She’s been facing corners of her cage and staring at walls and backsides of her hidey. Her posture is becoming hunched. Last night I noticed twitching within her arms and legs, nothing too sporadic . I bathed her yesterday with her partner and i noticed her eyes were dulling, not as wide and curious as they once were. I have been reading about different illnesses, and i think she could have a respiratory sickness, but i feel like she has not had all of those symptoms. Is she on her way out? If so, what should i do to comfort her?