Piggly
Adult Guinea Pig
Ok, so I've just been waiting for Eddie to wee which he has finally done
and I've tested it using a stick the vet gave me. She did write a guide for it on an envelope for me but I think I've lined it up wrong. The photos are a before and after. As there are colour changes on it, could somebody help me out to see what they mean?
Before:

After:


Before:

After:
