It's O.K if he has to throw up....it was the superworms that did it, but if he throws them up he'll recupe after a day or two. If this is a calcium deficiency,it is something that started before you got him, not your fault and it's probably not serious yet, you just need to correct a few things. Now you say it's a Zoo med, one more thing ....does it say Powersun anywhere on it ? Because if it says Powersun, then it is a mercury vapor bulb which DOES provide UVB. If so, did you buy it new or did it come with the beardie. If it does NOT say Powersun, then it's not providing UVB , just heat. In that case you need to get either a mercury vapor bulb ASAP or a long tube Reptisun 10.0 [ not compact or coil bulb ! ] This is essential to do immediately. I edited, realize you don't live in a warm state...I was writing as you posted.