One little Butt-Head still not eating

Out of the baby hognose I mentioned in my last post, I'm now down to one little butt-head that still refuses to eat.

Things I've tried -

Live Pinky
Live Pinky in a deli cup
F/T Pinky
F/T Pinky in a deli cup
F/T Brained Pinky
Tuna Juice scenting
Salmon Juice scenting
Salmon pieces
Mackerel Juice scenting
Vienna Sausage Juice scenting
Shrimp scenting
Shrimp pieces
Rosy Minnow scenting
Rosy Minnows
Hard Boiled Egg scenting
Hard Boiled Egg pieces
Chicken scenting
Anchovies scenting
Sardine scenting
Frog (Pacman) scenting

I've also tried moving his spot on the rack to see that would change his mind.

Of the other 6, one will only eat live for now, but it doesn't have to be scented, and the remain 5 are all on F/T unscented.

Any additional advice to get this little guy to eat? He's got me pretty frustrated.

Usually you will have about 1% that will be like this not wanting to eat no matter what you offer and will have to be assisted.

How do you keep it. Enclosure size and temps?

Hi, Deborah, thanks for helping me with this.

I've been keeping them all in 6 qt tubs in a rack. The warm side is set to 90 degrees, the cool side is 82, and ambient for the room is 80-82. I've been keeping them on paper until they've eaten (and pooped) a few times to make sure the plumbing is working, then switching them to aspen so they have something to burrow in. I've also got little hides in for them in case they want to, well, hide so they can feel more secure. (The minis size black ones.)

The little frustrating guy has now been at both the top and bottom of the rack and while he looks interested when offered food, still won't take it. He's holding steady at 5 grams and while thin in comparison to his siblings, doesn't have a pointy look to him yet. I have sandwich size containers I could put him in if you think size is to big for him to feel comfortable.

Thank you again. I appreciate any assistance.