I think it depends on the child and the adult. i honestly think its as simple as that. some people if they talk about getting a rabbit, i show then RR,RU, na dgives them care sheets and info. others, i just say 'i wouldnt think a rabbit would be good etc etc' i have been different with 2 families, and both had kids the same age.
because when i was a kd, i loved my pets. i neva 'forgot about them' or got bored of them. so i dont think its fair for me to now be a hypocrite.
but then, whenever i wanted a pet, my parents made me wait at least 3-6 months to make sure i wanted it. when i was 9 i got my first hammie, 'sherbet' and i asked for her from july to december, and i was so sad when i didnt get one for xmas! i had books n everything i was obsessed! then on my birthday in january, my mum got her and put her cage in my room so she was there when i woke up, and i was so happy!
i think parents shouldnt let kids have pets on a whim, i know i would never have got bored of her anyway, but because of the way my parents were by making me wait etc, it made me so grateful i had her, which made me love her even more