Appreciate everyone's responses. I thought he was looking rather thin but wanted a second opinion. He's been a consistent eater since I got him. He's eaten every single week on f/t mice and has only started rejected when I introduced rat pups. So for the suggestions of feeding live and/or switching to a tub, I don't foresee an issue of him not eating if I switch back to f/t mice. I was just hesitant on doing this from all the feedback on this site which tried to reinforce the need to get him on rats and to keep trying until he eats. I spoke to the Garrick (who I trust) and he said if males eat mice their entire life and that big males can do fine on 2 jumbo mice per feeding.

For the record, he's currently in a pvc enclosure where the temps and humidity have been good.

I was going to try one more time w/ rat pups (since I at least struck at one last week) but if you think it's more urgent to get him back on mice ASAP I can go that route. This is my 1st BP so I'm all ears on suggestions.