Fourteen inch tall Einstein, a minature horse, plays with St. Bernard Hannah (L) in a field in Barnstead, New Hampshire.
Fourteen inch tall Einstein, a minature horse, plays with St. Bernard Hannah (L) in a field in Barnstead, New Hampshire.
A boxer rests as a Dachshund pup approaches it in Sagua La Grande, province of Santa Clara in central Cuba.
A boxer rests as a Dachshund pup approaches it in Sagua La Grande, province of Santa Clara in central Cuba.
A German Shephard dog known as 'Pepper' sits with two endangered Bengal Tiger cubs and a Cougar cub (R) at the home of Veterinary Surgeon Rob Zammit in the outer Sydney suburb of Windsor. Zammit took the orphaned cubs into his care after their mothers rejected them as a result of recent heavy rains scaring them into focusing on their own survival. Zammit's dog then stepped in to help them with supervising their cleaning and toilet training.
A German Shephard dog known as 'Pepper' sits with two endangered Bengal Tiger cubs and a Cougar cub (R) at the home of Veterinary Surgeon Rob Zammit in the outer Sydney suburb of Windsor. Zammit took the orphaned cubs into his care after their mothers rejected them as a result of recent heavy rains scaring them into focusing on their own survival. Zammit's dog then stepped in to help them with supervising their cleaning and toilet training.
A mouse rides on the back of a frog in floodwaters in the northern Indian city of Lucknow.
A mouse rides on the back of a frog in floodwaters in the northern Indian city of Lucknow.
A four-month-old Amur tiger cub (top) plays with a dog in the municipal zoo 'Royev Ruchey' in the Siberian city of Krasnoyarsk. The dog, which has a puppy of its own, nursed the tiger cub and another Sumatran tiger cub after the mothers refused to nurse them.
A four-month-old Amur tiger cub (top) plays with a dog in the municipal zoo 'Royev Ruchey' in the Siberian city of Krasnoyarsk. The dog, which has a puppy of its own, nursed the tiger cub and another Sumatran tiger cub after the mothers refused to nurse them.
Mohammad Al-Hamoury holds a kitten and a puppy at his house in Amman. Al-Hamoury's cat Smaigel is parenting four puppies whose mother died in a car accident.
Mohammad Al-Hamoury holds a kitten and a puppy at his house in Amman. Al-Hamoury's cat Smaigel is parenting four puppies whose mother died in a car accident.
Rabbits play with tiger cubs at a theme park in Sanya, in south China's Hainan province. The artificially bred tiger cubs get along well with rabbits, which generates tremendous interest among visitors.
Rabbits play with tiger cubs at a theme park in Sanya, in south China's Hainan province. The artificially bred tiger cubs get along well with rabbits, which generates tremendous interest among visitors.
A rabbit rests with a tiger cub at a theme park in Sanya, south China's Hainan province. The artificially bred tiger cubs get along well with rabbits, which generates tremendous interest among visitors.
A rabbit rests with a tiger cub at a theme park in Sanya, south China's Hainan province. The artificially bred tiger cubs get along well with rabbits, which generates tremendous interest among visitors.
A piglet sleeps on a tiger at Siracha zoo, 80 km (50 miles) east of the Thai capital Bangkok. The zoo is trying to boost visitor numbers by teaching domestic animals such as pigs, and wild animals such as tigers, to live together in harmony from an early age.
A piglet sleeps on a tiger at Siracha zoo, 80 km (50 miles) east of the Thai capital Bangkok. The zoo is trying to boost visitor numbers by teaching domestic animals such as pigs, and wild animals such as tigers, to live together in harmony from an early age.
A one year-old baby Hippotamus gets close to his adopted mother a giant male Aldabran tortoise at Haller Park in Mombasa.
A one year-old baby Hippotamus gets close to his adopted mother a giant male Aldabran tortoise at Haller Park in Mombasa.
Two lion cubs and a dog play in the courtyard of a domestic house in Kharkov some 450 km northeast of Kiev. The three-months old lions live in the house of Tatyana Efremova, a veterinary in Kharkov, who also keeps a number of other exotic animals.
Two lion cubs and a dog play in the courtyard of a domestic house in Kharkov some 450 km northeast of Kiev. The three-months old lions live in the house of Tatyana Efremova, a veterinary in Kharkov, who also keeps a number of other exotic animals.
A Ring-tailed Lemur and a parrot are seen in their enclosure at the Hagenbeck Zoo in Hamburg.
A Ring-tailed Lemur and a parrot are seen in their enclosure at the Hagenbeck Zoo in Hamburg.

Big or small, ferocious or timid, friendships can develop between the strangest of animals.

These critters have struck up a friendship.