Love the second picture of Finley!

I hate to ask more questions, but this is my first pet and the first time she's been sick. Is loose stool a normal side effect from the meds? Can I give her something to prevent it? She's much more active tonight, so I feel like she's improving, but I noticed that today and am wondering if I need to be concerned about it.

She was feeling well enough to count the money from the market today: