Constipated Guinea Pig. When a bunny or guinea pig’s not pooping, we think of a condition called stasis. A stressed guinea pig may not feel at ease enough to feed as is expected, and if it’s usual digestive cycle is disrupted, constipation may result down the line.

It is very unlikely that a guinea pig is constipated given their diet. If your guinea pig is constipated, you may observe the guinea pig is uncomfortable during pooping or is acting like he’s pooping but nothing comes out. Constipation can be caused by various things.