So I got a baby ball python (about 5 months old) back in the beginning of October. I have an appropriately sized tank with the right equipment, temperature, humidity, etc. However, He hasn't eaten since I got him. I've tried feeding him almost every week and he checks the mouse out but doesn't eat it. He hasn't lost a significant amount of weight, but his skin feels really loose and saggy. He almost looks like he's getting skinnier. Is he losing weight because he hasn't eaten or could he be dehydrated, or is it something else entirely?

Riley