Super cute tricks!
What are you using for treats?
If you wanted, you could use something much smaller. They shouldn't have to sit down and chew the treat. It should be just a TEENSY bit. She's actually getting quite a few calories just in your training/tricks. I know some people use whole grain cheerios. Break them in HALF or even thirds. And that is the treat. For a tiny dog, even 10 cheerios is a lot.
"Having heard all of this, you may choose to look the other way.....
but you can never say again that you did not know." William Wilberforce 1759-1833