Complex sentence: They are also prone to obesity in captivity because seasonally savannah monitors will remain inactive when their environment is hot and Dry, many "sav's" as they are nicknamed are often over fed by inexperienced keepers which can also lead to obesity.
Split into simpler sentences: They are also prone to obesity in captivity because seasonally savannah monitors will remain inactive when their environment is hot and dry. Many "sav's", as they are nicknamed, are often over fed by inexperienced keepers which can also lead to obesity.