Lion Fortis arrived at the zoo when his leg was amputated due to his mother injuring it at birth.
Elsa the dog was brought in as a companion to him.
Later the zoo received a tiger named Lavanda and her sister Liana.
The animals live, sleep, eat and hunt for stuffed toys together.
Zoo workers say that they have fallen in love with each other and become best friends.
Irkutsk zoo started as a shelter for the animals which had been rescued from various situations over the years.