Short answer: jellyfish or various small insects.
If you want a deeper answer, it depends on what you call a brain
because a jellyfish has a nerve cluster which is technically a giant brain
and the insects without brains have what we call: ganglia
it is basically a brain just with no ability to think abstractly;
it just controls basic functions and instincts.
mindless people
my babys favorite animal is a lion.......
I think Roc or prince
dog
all animals
a dog
roc royal loves animals
I believe what you're asking is "what are feral animals". A "feral" animal would be an animal that is aggressive, hostile, and mindless.
Lion
cat horse dog zebra
Out of the four, Roc Royal has mentioned he is an animal lover.
prodigy from mindless behavior WILL go out with you all you have to do is be mindless not bad mindless well let me just explain it to you mindless behaviors mindless means a movement if you have swag your mindless if you get good grades in school your mindless and if you your self your mindless all prodigy looks for in a girl is her being pretty and mindless so if your pretty and mindless and live in los angles California then your very lucky you might have a chance with prodigy from mindless behavior!!!!!!!!!!!!!!!!