Hi, first of all welcome to the forum.....right now to it, 13 is a very good age for a captive iguana, it could be something simple like parasites but i would ask if thier are any other differant things...
how quick has the weight lose been?
is it drinking more frequently?
does it abdomen look swollen even though losing weight?
is it neck swollen (not the normal jowels)
how quick has the weight lose been?
is it drinking more frequently?
does it abdomen look swollen even though losing weight?
is it neck swollen (not the normal jowels)