Something else you could try, I just had to do this morning.
Feeding my normal, I just put the rat in the enclosure, leave it over night, and it is gone in the morning. Normally, if the rat is still there in the morning, I remove it from the cage and won't attempt until 10 days has passed.
This time I was kind surprised he didn't eat because as I was putting the rat in the enclosure last night, he struck at the rat and missed. He just came off of a feeding strike, so I just figured he was more hungry than normal. I took the rat out this morning when I woke up, used a blow dryer to heat up the rats head for about 30 seconds, and it took less than 5 seconds from putting the rats head in the hide were my normal was in, for him to strike and start to swallow.
Not sure if this will help, first time I ever did it, I did it this time because I knew he was hungry. Maybe something worth a shot.
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