I read this week that Calgary Zoo has decided to return its two giant pandas, Er Shun and Da Mao, to China due to difficulties getting enough bamboo to feed them. The coronavirus pandemic has caused flights to be limited, so getting a steady supply of bamboo flown in has become a challenge.
Er Shum and Da Mao spent five years at the Toronto Zoo before moving to Calgary in 2018. They were scheduled to remain in Calgary until 2023. The zoo's president said the safest thing to do for the animals is to return them to China, where their food supply is abundant. The risk of not being able to provide food is unacceptable.
Fresh bamboo makes up 99% of the panda diet, with each adult panda consuming about 88 pounds a day. In other areas where there are zoos with giant pandas, the bamboo can be grown locally, but that is not the case in Calgary. I'm sure this was a difficult decision to make, but the welfare of the pandas is the most important thing.