I have an adult texas indigo, about 4-5 years old, that started to regurge small rats several months ago. Was advised to decrease heat and therefore got rid of basking spot. Tank temp is about 80 degrees. Started to feed adult mice vs small rats about every 2 weeks. however, now my snake looks thin and has started to seem sluggish. His last shed was incomplete. At this point, not sure what I should do? Looking for recommendations.