Bronnen:
10. https://www.dailymail.co.uk/news/article-6961037/Cat-adopts-four-adorable-squirrels-Russia.html & https://www.youtube.com/watch?v=k3Bkdwobulc
9. https://www.boredpanda.com/ingo-poldi-dog-owl-friendship-tanja-brandt
8. https://www.boredpanda.com/lion-tiger-bear-unusual-friendship-animal-shelter-georgia
7. https://www.youtube.com/watch?v=IRRCVyIFvfk / https://soranews24.com/2013/12/05/hamsters-are-friends-not-food-says-japanese-snake-ao-chan/
6. https://metro.co.uk/2012/08/15/loving-dalmatian-adopts-abandoned-sheep-in-dogs-clothing-537197 / https://www.youtube.com/watch?v=qX4LR90fRIg
5. https://www.dailymail.co.uk/news/article-498789/The-tiger-adopted-litter-piglets-tale-porkies.html
4. https://www.womendailymagazine.com/rat-and-dog-are-the-best-buddies-ever / Osiris & Friends Youtube / https://www.youtube.com/watch?v=imOW3xrn05Q
3. Wikipedia / https://mutually.com/trending/2018/05/26/130-year-old-tortoise-saves-baby-hippos-life-now-theyre-best-friends/
2. https://www.dailymail.co.uk/news/article-2724858/They-busy-Meet-double-amputee-new-lease-life-hand-rearing-tiger-cubs-lets-chew-prosthetic-leg.html / Barcroft / Mindwarehouse
1. https://www.dailymail.co.uk/news/article-3621968/Friends-FORTY-years-Never-seen-pictures-Koko-gorilla-struck-inseparable-bond-trainer-taught-communicate.html
0. Videoblocks / Getty / Reuters / Shutterstock / Alamy / Wikipedia / AP, ABCnews, Metro, Tanja Brandt, Mindwarehouse, Noah's Ark Animal Sanctuary, BBC