yellow cocktail dresses

My dog is at the high end of stage 1 kd. I am doing a combination of Royal Canine renal canned food and home cooking, supplemented with a Chinese herb. My vet has not suggested any binders or fluids yet. My questions are: yellow cocktail dresses
1. How often do you do bloodwork/urine analysis?
2. My pup, like so many others, struggles to eat. This morning she threw up yellow bile. Could the bile be from her kd?
Thanks in advance - I've shed so many tears worrying over my girl.