I volunteer at the reptile house at the national zoo, and yesterday I got to feed the 30+yr old 147 lbs green anaconda. AND IT WAS WICKED that is a lot of mass to move that rapidly and aggressively towards a dead rabbit lol. Its nothing like feeding a ball, blood, corn, or even diamondbacks, and the cobras. He basically rolled around the enclosure wrapping up its coils splashing water everywhere and ending up in the pool.