If those are female which they most likely are because of the size they are healthy weight.A 8' boa can be 40 pounds and still be healthy i believe.Most of those are 10' feet long or more so they can have some weight to them,plus none of the ones i saw had fat rolls.
Reptiles make life tolerable.
Jeremiah Elleman[FONT="Comic Sans MS"][/FO
Having seen an 11' female weighing ~70lbs (about 10 years old) in person, I can believe those boas are not obese but huge! Just well fed from baby to adulthood.
Zack
Asking dumb questions is easier than fixing dumb mistakes.