Tammi Roy, UT 8/12/2009 8:00:26 PM I would like to know more specifically about how soon should a dog void after surgery, walk, etc and when should you become concerned. Should you force small amounts of fluids via oral syringe if dog isn't taking it on it's own? How much and how often? My 4 year old chihuahua is taking a longer time than my 13 year old Jack Russell Terrier. When should I become concerned?