Count ID with only one element associated

[RandomUserPby]

Hello,
I have a table like this :

and I want to count IDs where I only have a pig associated with (so, in my example, ID 2 is an ID with only pig and nothing else)

I think its very easy to do in DAX but idk how to do it... 

Thanks you.

[Anonymous]

could you try this:

PigCount = calculate(countrows('Table'),'Table'[Animal]="Pig" && count('Table'[ID])=1)

[RandomUserPby]

Hello, not good !

[Anonymous]

Have you tried putting the dax formula on a calculated column?

[RandomUserPby]

Yes, it don't work