Hello, I had a few ?'s on my father's female iguana . . . she's about 12 years old (he got her in 1995 at about a year old), still living in the same HUGE enclosure my dad put together for her, same lighting/heat . . . everything she's always thrived well on . . . the last few months she stopped putting on any weight even though she's still eating her salads . . . any advice for him? The local herp guy that Dad had come and look at her said she was just old, and that there was nothing Dad could do . . . any thoughts?? She's skin and bones, I feel so bad for her . . .