Male are typically more difficult than females when it comes to food, and it's true until they get some size tongue feeding does not work leaving the prey in the enclosure until the morning works best.
You don't really have to worry about the prey being warm, I feed all mine adults, juvies and hatchlings without re-heating the prey and they don't care.
Right now being a male and with the weather changing (cold, low pressure etc) feeding can become more difficult.
If your hognose was well started meaning at least 10 unscented meals and or 10 f/t meals you should be able to get him back on food.
In the event you do not y ou can use one of the following scent (I do not recommend toad or lizard since they can carry crypto which is fetal)
In order of what works for me
Vienna Sausage
Tuna
Hard Boil egg, you can even leave a piece in the cage
Chicken water from chicken in a can
Anchovies
Sardines
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