Hi we recently acquired a 8ft coastal carpet 2 months ago. He was a previous education animal at a wildlife zoo, there was no feeding history or any details given. Looked like a very healthy snake. Has shed once badly and still has some on chin required help water spray and herpa shed. Has only eaten a small quail refused everything else large, small, left overnight, with herp boost added etc. no regurgitation of food ate this 2 weeks ago hasn't pooed since. Did poo on grass before the quail. The main problem we have now noticed which wasn't the case before is a rigid section of body from about 15 cm behind head, area is rigid when moves and is a total of 1ft length rigid section. Can't seem to bend it anymore. Difficulty getting off lounge to floor. Is in a ground enclosure no climbing branches yet as need a taller enclosure I the process of sorting this. So there was no trauma, no fall, no rough handling etc since in our care. Just suddenly stiff. Has some small lumpy bits on underside in stiff section. Have tried gentle massage just now and seems to have improved slightly. Don't want to over do it so resting now after massage and see if their is a reaction to this. Any ideas, anyone had his before? Going to vet next week.not open till Monday.