British Airways has temporarily suspended its service carrying dogs in the hold on flights after one pet was found to have been carried in the incorrect-sized crate.

Investigation is underway, during which time it will not allow passengers to book dogs to travel. The airline has made it clear that no harm came to the dog in question.

Unlike American airlines, British Airways does not allow dogs or other pets to travel in the cabin as “emotional support animals” for passengers. However, registered assistance animals are exempted.

Source: https://www.independent.co.uk/travel/news-and-advice/british-airways-dogs-cargo-hold-crates-ba-pets-flight-a9274021.html