The bag of Kaytee Baby Bird Food says one can use infant applesauce with slow crop, but I haven't tried it and I don't know if it would be appropriate when treating coccidiosis.
http://www.kaytee.com/products/exact-hand-feeding-baby-bird.php
CROP SLOW-DOWN: If crop slow-down should occur, first check for proper environmental temperature as this is a frequent cause of crop problems. Then mix equal parts of exact Hand Feeding Formula and infant applesauce or provide additional water by preparing exact at the ratio of one part exact to two or three parts water. Provide this mixture for approximately 24 hours and then slowly return to the normal concentration of exact over an additional 24 hour period. During this time, massage the chick’s crop gently to break up any food aggregates that may develop. Never massage the crop when it is more than half full. Allow the crop to empty before feeding again. This method will quickly allow the gastrointestinal tract to stabilize and become fully functional again. The appearance of dark green droppings in a hand fed baby may indicate a temporary shut-down of crop emptying (or the lack of food in the digestive system). If this occurs and the crop contains food, the rate of crop emptying should be immediately evaluated. If no improvement is noted within 36 hours, professional assistance is advised.
The above says to massage the crop, but I sure wouldn't!
-Kathy