I went to petsmart today and finally got Missing link for Tinkerbell, she has been having problems with her skin/fur

. How do I feed it to her??? It's a powder supplement, right?

I thought it was regular food........anyways

can someone tell me what is the best way to feed it to her??? and how much of it??? I am supposed to refrigerate after I open it?? I can't get her to the vet until next monday