This golden retriever mum adopted two leopard cubs and it's too adorable

Tessa is enjoying her mothering duties. (AsiaWire)

Two leopard cubs have been adopted by a golden retriever who is now caring for them like they’re her own.

The newborns were separated from their natural mother, Alyena, after she’d previously eaten her other cubs.

Keepers at Sadgorod Zoo in the city of Vladivostok in south-eastern Russia’s Primorsky Krai region thought it would be safer for the cubs to grow up with a different mother figure.

Tessa the golden retriever dog is nursing them as if they were her own puppies. (AsiaWire)

At first, they placed them with a goat named Manya, who had recently given birth to her own kids.

But the cubs didn’t take to Manya, forcing the zoo keepers to look elsewhere.

Most popular on Yahoo News UK:

These four countries hate the EU even more than Britain
Father suspected of killing wife and three children at French farmhouse before shooting himself
Shocking photos show fish almost cut in half by discarded sports drink wrapper
Labour activist says she was raped by senior figure and told to cover it up
Revealed: How much the UK pays the EU per person every day

Tessi, a golden retriever, had also just given birth but was happy to take on the mothering role again.

Luckily, the cubs took to her straight away.

The family live at the Sadgorod Zoo in the city of Vladivostok. (AsiaWire)

And, from the way they crawl all over her and nuzzle at her teats, the little leopards clearly feel at home with their new mum.

Zoo director Alena Asnovina revealed one of the cubs had heart problems but the other was in perfect health.

One of the cubs had heart problems but the other was in perfect health. (AsiaWire)

The zoo recently shared a video of the unusual family unit on social media, where it is proving popular with animal lovers.

User ‘kittykisu’ said: ‘This is so cute!’, while ‘katy_odinskay’ added: ‘The little one[s] are so adorable.’

The family seem very happy together. (AsiaWire)

Crossing the lines between species appears to be all in a day’s work for keepers at Sadgorod Zoo.

Last week it revealed that its new lion cub, Astra, had become best friends with a young central Asian shepherd dog, called Elsa.