I use the rule, no play hour before and after eating. When we're out exercising, normally the last 1/4 mile I force us to a slow walk, so they have time to cool down before gettiing a drink as well.
Mr. Red - Rescue GSD (CGC)
Ms. Charlie - RIP 1-14-2014 Rescue GSD
Ms. Gypsy - Yellow Lab (CGC)