Sorry for the wait and TY for the suggestions, peeps. I feed f/t, thawed slowly in warm water and then use hot water to warm them up.

I have never had a problem with this method before and have transitioned live feeders to f/t and mouse feeders to rats successfully.

According to the breeder, she's taken f/t from almost the get go and my friend who bought her got a f/t rat pup down her with no problems. Since moving her to a 6 qt tub a month ago, she seems a bit calmer but still isn't feeding. Her reaction to offered prey seems to be a fear one, even from small pups and weans. She has struck at a mouse in the past but as of today, showed no interest other than fear.

I left a f/t mouse in her tub today to see if she needs peace, quiet, and darkness to eat. Still hoping for the best here.

I am reluctant to try live only because of her fear response and prey aggression. I don't have a feeder rat breeder nearby so my options are the local chain pet store for mice.