Feed the correct number of treats 4 times to increase the productivity. You have to feed each set of treats to go from 1 to 2, again from 2 to 3, again from 3 to 4, and yet again from 4 to 5. However, to get from 4 to 5 you must ALSO have 9 hearts with the animal, and the animal must have spent 1,000 hours outdoors total.
Game clock. If you rely on pets to do your herding then your animals will be outside 10 hours a day in sun or snow, which means as least a 100 days. Really with as much rain as you get in fall it's best to estimate that the animal needs a year or so to get the grazing amount.