Hello, I have a requirements to populate a picklist base on the values in the string field All__c. For example.

I have a picklist Animals__c which have data of "Dog, Mouse, Cats, Rats, Birds".

in Record Type 1 Animals__c values are "Mouse, Rats"
in Record Type 2 Animals__c values are "Dog, Cats, Birds"

In Record Type 1:

If the field All__c has the value of  "2" the Animal__c in record type 1 = "Mouse, Rats"

If the field All__c has the value of  "3" the Animal__c in record type 2 = "Dog, Cats, Birds"
If the field All__c has the value of  "2,3" the Animal__c in record type 5 = "Mouse, Rats,Dog, Cats, Birds"

Any help will be very much appreciated.
Thanks!