I want to change Miss Nightingale but not to sure what to turn her into she would like your help thanks. She is a Common Experiment at the moment.
I usually make this decision based on one of two things - if I have a character in mind for the pet, what species and color best fits that character or, if I don't have a character in mind then I just look at the species and color combos and decide which one I like the most :) You can view all the combinations on subetalodge.org