It needs to be said that your level of concern and your willingness to take action to help an animal that is clearly suffering is extremely commendable. The fact that the person neglecting this beardie is a close friend makes me wonder what I would do in this situation. But the truth is that if I saw an animal being abused or neglected by a friend, it would be a glaring red flag that this is a person lacking empathy, kindness, and morality, and therefore not someone I’d want to associate with. The most disturbing part of your friend’s persona was when you went to great pains to attempt to help their ailing pet, going so far as to spend your own money to buy proper lighting that could give this poor lizard a shot at health, and your friend refused to use the most vital component a bearded dragon needs just to function. He clearly never did any bare bones research on what a bearded dragon needs to live a healthy existence, and when you attempted to educate or help him he rebuffed your efforts. If my best friend bought a bearded dragon on impulse, refused to purchase a UV light, which is as essential to bearded dragons as water is to fish, fed the animal a crap diet, kept the animal on a substrate that could lead to impaction, and installed a neon red light so that the beardie would be constantly stressed, then refused to change anything no matter how many articles by vets, breeders, and herpetologists I sent them that show that everything they’re doing is causing their pet pain (and I use the word loosely because “pet” implies a level of love and caring for an animal this person clearly doesn’t possess), then there’s only one conclusion: My friend is an a—-hole. In your scenario there’s an animal that spent its formative years suffering, but there’s hope for this creature because like it or not, your conscience has made you the fairy godmother in this animal’s life story. I would definitely get this beardie out of that house ASAP through any means necessary. Since your friend’s neglect of the beardie implies the animal has little emotional significance to him, offering to adopt or buy the beardie from him could be this lizard’s only hope. You’d clearly make a compassionate and knowledgeable owner for this animal, and with the proper lighting and diet this beardie would still have a shot at a decent life (I know this because I adopted a beardie whose early years were filled with such a horrific level of neglect and abuse that the details would make many beardie lovers on this site burst into tears. But after a long rehabilitation she began to flourish and the animal that before had been too weak and malnourished to move became a puppy in a lizard’s body. She was so full of curiosity and joy that people were shocked to learn she’d once been at death’s door due to the cruel neglect she’d suffered. And she lived to be 17 years old, BTW
). You tried the teach-a-man-to-fish approach but your friend refuses to listen and stop forcing this animal to suffer. So I would highly encourage you to take this animal into your care—doing whatever you have to do to get your friend to relinquish the beardie—and give it the life it deserves. The fact that you care so much about this lizard and that you’re considering spending money just to get this animal out of a miserable situation is a testament to YOUR character. And I can say from personal experience that watching an animal that was destined to die young based on the neglect it would have continued to endure without intervention blossom into an energetic and loving beardie that gave me so many happy years as her owner is a feeling that’s unequivocal. So yes—get that beardie under your loving roof.
If for some reason your friend refuses to give you the beardie he’s turning into his own personal snuff film, you can call a local animal shelter or animal control agency that can assist with steps to get the animal out of his care. My hunch is that things wouldn’t need to get to this point and that he’ll take you up on your offer, but whether he sells you the lizard or it needs to be confiscated in order to save its life, at the end of the day your friend is an a——hole. As soon as the animal was safely under my care, I’d consider limiting my social circle to people that don’t abuse or neglect animals. In both relationships and friendships, that trait will always be an automatic dealbreaker for me.