Sometimes they will compete for mates, but they usually don't compete with each other. On occasion, weasels, wild dogs, marten, and leopards will prey on the baby panda cubs, but this is not a frequent occurance. The mother is vicious and very vigilant to make sure that this does not happen. Wild dogs and leopards will also sometimes prey on very old or sick pandas, but again this is not frequent. Red Pandas and Bamboo Rats compete for bamboo in the Giant Panda's habitat in China, but they are not major competitors.
Humans are the biggests competitors with the pandas.
Even though there have been some conflicting ideas and hard to find research, many people think that a Giant Panda can expect to live to be from 17- 20 years old in the wild. They have disease and food storage problems. In captivity, though, it can expect to live to be 25 or even 30. The mating habits of the animal cause it to be less common. Thier habitat is being taken over by humans, and the wet climate of China has changed to being drier.