H5N1 remains an avian influenza and has not taken root in another species, such as pigs.

NPR: Bird Flu 101: How Bad Is The New H7N9 Strain?

Foot-and-mouth disease affects animals with cloven hooves such as pigs, sheep and cows.

CNN: Seven new UK foot-and-mouth cases

They hope their discovery may allow organs to be transplanted from other species, such as pigs, and have filed a patent based on the idea.

ECONOMIST: Organ transplants

Dr Ichinose added that the findings would need to be replicated in larger animals such as pigs as mice may be more susceptible to induced hibernation.

BBC: NEWS | Health | Gas induces 'suspended animation'

The H7N9 virus, previously known only to infect birds, appears to have mutated so that it can more easily jump to animals such as pigs, meaning the range of potential hosts has expanded.

WSJ: Bird Flu Worries Sink Airline Shares

Domestic animals, such as dogs and pigs, also dig up and eat or destroy more than one million eggs every season.

BBC: volunteers pulling a turtle to safety

Here the Ashbridge family lovingly nurtures native English breeds such as Gloucester Old Spot and Saddleback pigs, and Longhorn and Dexter cattle, the latter known for its creamy yellow fat and the marbling in its meat.

BBC: Eat your way around Yorkshire

Dingoes control populations of animals that compete for pasture with cattle such as kangaroos - and possibly feral goats and feral pigs.

BBC: NEWS | Science/Nature | Dingo has 'vital ecosystem role'

Tests in mice and guinea pigs have shown that such vaccine microspheres are as safe and effective as conventional shots.

ECONOMIST: Vaccines

And here, with controversial works such as deformed crucifixes set on the grand dining table and tapestry pigs sitting under grandiose crystal chandeliers, Delvoye is certainly examining and challenging the status quo of an institution like the Louvre.

BBC: Controversy at the classical Louvre