random action macro

hi my druid is a bit ... absent minded and when shape shifting it does not always go to plan so i would like a macro to determine what i shift into randomly so the jist of it would be /me transforms into a #rat #brown bear #cow and it would pick one of the options these 3 are just for example my problem is i don’t know how to do this in a macro and can’t seem to find the answer if someone can tell me how with an example or point me to the answer it would be much appreciated

You could have the DM make you a roll table that is a list of each animal you can shift into then you click this and it tells you the outcome of your attempt I did a similar action for a wild magic surge table for my sorcerer