Simple Animal Pens

1-adding mob

adding the mob into the entity tag #sap:fit_in_jar
you can edit the whole tag if you want to remove animal, or you can just addon top of it with replace : false

  {
    "replace": false,
    "values": [
        "minecraft:cow",
        "minecraft:pig",
        "minecraft:sheep",
        "minecraft:chicken",
        "minecraft:turtle",
        "minecraft:bee",
        "minecraft:rabbit"
    ]
}

2-adding right click functions

create new item tag inside sap named used_on_ENTITY and specify what items can be used on this mob

then create new function named interact_with_ENTITY in

sap:click_functions/loot/

inside the function you can run whatever you want. you can split the function into 2 or more if you want more than 1 click function or diffrent tools
the default file for bee looks like that

execute if items entity @p[tag=this] weapon.mainhand *[minecraft:custom_data~{smithed:{ignore:{functionality:1b}}}] run return fail

scoreboard players set @s sap.function_cooldown 12000
scoreboard players operation @s sap.function_cooldown -= @s sap.entity_count
scoreboard players add @s sap.function_cooldown 100

execute as @p[tag=this] run function sap:click_functions/loot/specific/collect_honey

inside the specific function you can add sounds,clear items,give items,particals etc

3-breeding

to add viable food for breeding create(or use the vanila one) item tag under the MINECRAFT namespace called ENTITY_food

4-Tool for breaking

tool needed to break the farm controlled by the item tag sap:tool_to_break

5-Tool for killing

tool needed to kill entity in the farm controlled by the item tag sap:tool_to_kill