Jäniksen Vuosi / The Year of the Hare (1977)
Young advertising executive Vatanen suddenly quits his job and his whole life in Helsinki, and decides to spend a while in the Finnish wilderness. A wounded hare hit by a car becomes his travel companion. Together they find reclusion in the Finnish Lapland, soon to be disturbed by a noisy group of foreign tourists and their pretentious Finnish hosts. When the hare gets ill and needs to see a vet, Vatanen must return to the city and finally face the choice between his new and former life.
And a link to watch it online with English subtitles (great website by the way):
https://rarefilmm.com/2018/08/janiksen-vuosi-1977/