Basically, the test entails eating small quantities of the foods you've been allergic to. (npr.org)
To help a larger cat lose weight, try feeding smaller quantities of food or gradually switch to a diet that is lower in calories. (gatehousevets.com)
If your rabbit can handle small quantities of this food without suffering from digestive problems, feel free to use it as a treat, but don't let it turn into a staple. (petconsider.com)