if your guinea pig is ill they will: stop eating, or may over eat; they will gain/loose weight; they will want to be left alone; they will sleep more than normal; and they will become cranky.
you will know if your guinea pig is pregnant because her she will started to be timid and or show signs that she dose not want to be picked up she may also not eat lose of apetite and another easy...
You should give them treats when they do something right, like for "up", you hold a treat above their heads and when they stretch up for the treat, you praise them and give them the treat. If you are...