User blog comment:Trutifruchti AJ/what are they worth?/@comment-36996285-20181223160207

The mouse and the ladybug are worth 1-3 den betas each, dependent on the pet and the people trading. The ferret is worth a few rims.

You can double check these worths on this page: https://aj-item-worth.wikia.com/wiki/Promo_Pets

Hope that helps!