Utah

“R657-5-15. Party Hunting and Use of Dogs.

(2) A person may not use the aid of a dog to take, chase, harm or harass big game. The use of one blood-trailing dog controlled by leash during lawful hunting hours within 72 hours of shooting a big game animal is allowed to track wounded animals and aid in recovery.”

State Regulations: http://wildlife.utah.gov/hunting-in-utah/guidebooks/942-r657-5--taking-big-game.html

United States:
Canada:

Green — Tracking allowed
Red — No Tracking allowed
Gray — Tracking allowed under certain circumstances or in certain areas of the state/province, but not all