Hi! When I need to take prednisone for myself my own doctor has the dosage wean down. When I seen another doctor this past spring she felt it was more effective to continue the same dose till done. As for the vet my vet never weans the dog off the predisone - keeps on the same dose till finished. So believe it depends on what vet. Prednisone does increase eating and drinking. Mght depend on the strength of the medication think it runs from 2mg to 20mg and 40 mg.