zombie animation creation biting character

hello guys
I’m having trouble creating an animation system where a zombie bites my character in the style of the game Project zomboid, I can not make the animations interact with each other, I can start them together, but I can not do the interaction, I am using a collision box, when my character enters this collision the zombie begins to bite, but the animations are not perfect, If anyone can help me thank you, my goal is to be as similar as possible to the game PZ.
sorry for any typo I’m using a translator