Im not sure if this will help or not... when i switched i was told to mix the mice and rats when i broke them down into smaller packages to make them smell the same. I started with 3 mice and 1 rat in the first bag, then 2 and 2, then 3 rats and 1 mouse. He never refused, not sure if i was lucky or it actually made a difference.
Sent from my SM-G930P using Tapatalk