Change Minecraft texture pack?

How can I insert the animals from another texturepack into another

You unzip both texture packs and open the following path in the texturepack that contains the animals: your_texturepack / assets / minecraft / textures

Under this path there should be a folder named entity, you have to copy it and paste it in the same place in the other texture pack

Okay thanks one more thing i have a pack that has cool sounds how do i add that to the other pack?

I think copy the folder with the name sounds under the path your_texturepack / assets / minecraft.