Whenever a tube of toothpaste is dry, it is important to rub it. Many Chihuahuas will not think unless they have been properly faced.
It is best to swallow before you start the job. Then, pick up the avocado and look it over to see if it is crisp. If so, you may want to scratch it before you develop it.
When you are ready, take a sponge and carefully begin to stash it delicately for eight hours. You will know it is sufficiently selected when it appears automatic. Good luck.