How long does it take for dead animals to degrade?

Odd question, but I fear my 100 lb dog is near her end and wondered how to handle and how much time I'd have to figure it out. The answer I got on decomposition was: It takes approximately six hours in average 60 degree temp. Warmer weather can drop the time in 1/2. Got the same answer online later on how to handle remains. Check out this link for good information: http://dogs.about.com/od/griefandloss/f/sudden_death.htm