He is on a 4L Really Useful Box (inside dimensions 12.5" x 8.5" x 3") with 2 small hides and a small water bowl on aspen bedding. Hot side is heated by a 3" flexwatt running constant temps at 90F measured with an acu-rite digital probe under the aspen, ambient temps at 80 (my house thermostat is set at 80 as well). Humidity at steady 60%. He has not been handled except when we clean his tub out or when we feed (every 5 days). He has only shed once since he was born.

His siblings are on identical set-ups and one is at 145g now and the other is at 149 grams. They have shed multiple times already. The problem feeder is exactly 52 grams 5 minutes ago which is only 7 grams more than when he hatched.

We have tried everything except braining method and f/t method. We have tried pre-kill, smaller size, different color, rat, mice, ASF, in the tub, out of the tub, in a deli cup in his tub, in a pillow case, overnight, etc.

We have taken him to the vet and the vet checked him out and said there's nothing physically wrong with him or anything blocking food intake.