Are you giving them different meat every meal/day?
This happen to my cat too. I have been feeding my cats raw for 8 months.
When they did not eat, I will add treats, canned food, tuna etc.
Slowly that does not work for one of my cats. He is eating very little, and I almost had to force him the first bite.
2 weeks ago, he is not eating canned food, baby food, not to mention raw. The only things he wanted to eat was treats and dry food.
When I brought him to the vet, the vet said I am building a picky cat. So he wants me to give him the same food for at least 3 weeks, so he knows he is not getting anything better.
This is my 7th day of giving him the same food (chicken), and now he does not even hesitate when I brought out the food.
Just gonna be tough sometimes. Good Luck!