A woman cuddles a dog at the train station after fleeing Russia's invasion of Ukraine, in Zahony, Hungary March 3, 2022. REUTERS/Bernadett Szabo 

A refugee fleeing Russia's invasion of Ukraine waits with a dog at the border crossing in Vysne Nemecke, Slovakia March 3, 2022. REUTERS/Lukasz Glowala 

People fleeing Russia's invasion of Ukraine stand with their luggage and a dog at the train station in Zahony, Hungary March 3, 2022. REUTERS/Bernadett Szabo 

A person fleeing Russia's invasion of Ukraine carries a dog in a backpack while boarding a train to Budapest departing from Zahony, Hungary March 3, 2022. REUTERS/Bernadett Szabo 

People fleeing Russia's invasion of Ukraine sit with a dog an a cat on a train to Budapest departing from Zahony, Hungary March 3, 2022. REUTERS/Bernadett Szabo 

A woman and her dog stand outside a temporary accommodation centre after fleeing Russian invasion of Ukraine, in Korczowa, Poland, March 3, 2022. REUTERS/Yara Nardi 

A woman and her dog wait at the train station after fleeing Russian invasion of Ukraine, in Przemysl, Poland, March 2, 2022. REUTERS/Yara Nardi TPX IMAGES OF THE DAY 

A woman comforts a dog as they rest at the train station after fleeing Russia's invasion of Ukraine, in Zahony, Hungary March 3, 2022. REUTERS/Bernadett Szabo 

People fleeing Russia's invasion of Ukraine, of which one carries a dog, attempt to enter a bus to Poland at a long distance bus terminal in Lviv, Ukraine March 2, 2022. REUTERS/Thomas Peter 

Ukrainian girl who fled with her mother from the Russian invasion holds her cat as she waits for transfer at a temporary camp in Przemysl, Poland, March 2, 2022. REUTERS/Kai Pfaffenbach 

A woman drinks tea with her dog inside her jacket, after fleeing from Russia's invasion of Ukraine, at the border crossing in Siret, Romania, March 2, 2022. REUTERS/Stoyan Nenov 

A child eats while holding a dog in front of a tent, after fleeing from Russia's invasion of Ukraine, at the border crossing in Siret, Romania, March 2, 2022. REUTERS/Stoyan Nenov 

A woman with a dog sits near personal belongings as refugees fleeing the Russian invasion of Ukraine, arrive at a border crossing in Vysne Nemecke, Slovakia March 1, 2022. REUTERS/Lukasz Glowala 

A woman holds a dog as refugees fleeing the Russian invasion of Ukraine, arrive at a border crossing in Vysne Nemecke, Slovakia March 1, 2022. REUTERS/Lukasz Glowala 

A woman carrying a dog collects food as people flee the Russian invasion of Ukraine, near a border crossing in Vysne Nemecke, Slovakia March 1, 2022. REUTERS/Lukasz Glowala 

A woman with her dog pauses after fleeing from Russia's invasion of Ukraine, at Sighetu Marmatiei border, Romania March 1, 2022. REUTERS/Fedja Grulovic 

A person holding a cat sits next to a bus window, as people go to western parts of the country after Russian President Vladimir Putin authorized a military operation in eastern Ukraine, in Kyiv, Ukraine, February 24, 2022. REUTERS/Umit Bektas TPX IMAGES OF THE DAY 

A person fleeing Russian invasion of Ukraine stands holding a dog during a snowfall at a temporary camp in Przemysl, Poland, February 28, 2022. REUTERS/Yara Nardi 

A dog stands between suitcases after his owners fled from Ukraine because of the Russian invasion as they arrive with a bus at the village of Moszczany near the border checkpoint at Korczowa, Poland, March 1, 2022. REUTERS/Kai Pfaffenbach 

A refugee fleeing from Ukraine stands with her dog at Nyugati station, after Russia's invasion of Ukraine, in Budapest, Hungary, February 28, 2022. REUTERS/Marton Monus 

A refugee fleeing from Ukraine stands with his cat at Nyugati station, after Russia's invasion of Ukraine, in Budapest, Hungary, February 28, 2022. REUTERS/Marton Monus 

A woman holds her dogs after fleeing from Ukraine because of the Russian invasion as they arrive with a bus at the village of Moszczany near the border checkpoint at Korczowa, Poland, March 1, 2022. REUTERS/Kai Pfaffenbach 

A person from Ukraine rests with her dog at a refugee shelter, after Russia launched a massive military operation against Ukraine, in Tiszabecs, Hungary February 28, 2022. REUTERS/Bernadett Szabo 

A refugee woman fleeing from Ukraine stands with her dog at Nyugati station, after Russia launched a massive military operation against Ukraine, in Budapest, Hungary, February 28, 2022. REUTERS/Marton Monus 

A woman with a cat waits on a platform after arriving with a train transporting hundreds of people fleeing from the Russian invasion of Ukraine, at the train station in Przemysl, Poland, February 28, 2022. REUTERS/Kai Pfaffenbach 

People with a dog wait on a platform after arriving with a Ukrainian train transporting hundreds of people fleeing from the Russian invasion, at the train station in Przemysl, Poland, February 28, 2022. REUTERS/Kai Pfaffenbach 

A woman fleeing Russian invasion of Ukraine holds a dog at a temporary camp in Przemysl, Poland, February 28, 2022. REUTERS/Yara Nardi 

A woman carries a cat after fleeing from Russia's invasion of Ukraine, at the border crossing in Siret, Romania, February 28, 2022. REUTERS/Stoyan Nenov 

A woman carries her dog after fleeing from Ukraine to Romania, after Russia launched a massive military operation against Ukraine, at the border crossing in Siret, Romania, February 27, 2022. REUTERS/Stoyan Nenov 

A man walks with a child and their dog as people arrive at a border crossing between Poland and Ukraine, as Polish Border Guards close lanes for vehicles to allow more pedestrian traffic, after Russia launched a massive military operation against Ukraine, in Medyka, Poland, February 26, 2022. REUTERS/Kacper Pempel 

A woman disembarks a bus, after fleeing Russia's military operation against Ukraine, in Athens, Greece, March 1, 2022. REUTERS/Costas Baltas 

A woman disembarks a bus, after fleeing Russia's military operation against Ukraine, in Athens, Greece, February 28, 2022. REUTERS/Costas Baltas