i have recently got a young argentine black and white. (about a month ago) according to the shop it’s a minimum of 4 months old however was eating well and looked healthy hence me giving it the go ahead in the first place. I got home and settled it into the new enclosure. 5ftx5ftx2.5ft. 12 Arcadia luminaire t5 kit 150w ceramic heating kit and a 75w par38 halogen bulb both hooked onto a eco stat so the par38 is the primary heat source and the ceramic engage when extra heat is needed. I get the hot side at 32c and the cool end at 28c and providing 2 basking spots one at 118 and one at 105 of which he thermometer regulates between the two over the day. On the day he arrived home he or she I might add ate a few locust and had excellent feeding response, before returning the the enclosure. Unfortunately after this it’s been a slippery slope and in addition the them 3 locust she’s eaten 1 pinky and a snail almost 2 weeks apart and a lick of a raw quail egg yesterday before these pictures where taken. I have noticed a sharp little lump just above the tail base. I have been to the vets and they said she’s active healthy and extremely friendly. I am now confused as to what to do as in all my years of owning tegus and reptiles I’ve never came across this. Ps humity is around 80 under the substrate and 65-75 in the air and she’s literally just had a perfect shed. Any advice or criticism welcome.