Burm stuck on mice

[KMG]

Usually rubbing the mice on the rat or thawing them together. I'll try with a rat scented mouse and see if that works

Do that.

Try to get a few good feedings in with the rat scented mice and then get a few feeding in with a mouse scented rat. After that is when I try a straight rat.

I wish you success. Keep us updated and let me know if it works for you.