Wanna know my secret ?
Baby food.
Seriously, baby food. I mix 1 jar of first foods meat, 1 jar of third foods chicken/vegetable mix, 1 container of second foods fruit, 1 container of second foods vegetables, and enough rice cereal to make it thick.
The parents gobble this stuff up like a kid with cotton candy, and if you have to pull babies early, they can eat this until they are old enough to eat the lab block.
It works with mice, rats, ASF and hamsters.
Gale