just wondering if anyone has tips for me on how to switch my adult male bp over to rats from mice..he has been eating mice since he was hatched as far as i can tell..i got him from a breeder he is 700+grams

i read somewhere that using chicken broth could work? is that a good idea to dip the rat in a small amount of chicken broth? i tried putting mouse blood on a rat and leaving it in his tank but he just looked at it and then left it there..i think i really need to move him up a size from jumbo mice though as he is big and probably needs something more!

thanks for helpin