Hello Betty!
Our shelter does not specifically track the volunteer hours provided by foster homes and care due to the difficulty of obtaining that information. However, we have had a few individuals track their the time spent caring for the animals in foster care (for a school project they were doing). They simply wrote down the time on a piece of paper, took care of the animals, and then wrote the time down of completion. They were "medical fostering" a sick animal so they ended up with ~ 1 to 1 1/2 hours per day.
Hope this helps some!
Amelia
#FosterPrograms