Bearded Dragon underweight before Brumation

[lildexter]

My beardie is a year old. It is beginning to become cold and it is that time of year. He has pooped recently. He just seems so sluggish and hes getting underweight to the point where i can see his tail bone. Is it just the symptoms of brumation or his he really not okay ?

 

[CooperDragon]

The sluggishness is common with brumation, but if he is losing a lot of weight then that's not normal and may indicate illness. They slow their metabolism during brumation so they don't eat much at all and don't expend much energy so their weight stays pretty stable. Significant weight loss should be checked out by a vet.