The other cat.

An empty food dish.

Cat b hated water. Cat a you could put under a shower and he'd be happy.

Cat b hated nail clipping. Well, about three paws might be tolerated but then it'd be enough and you got the teeth. Cat a didn't mind.

Cat b hated trips to the vet. Somehow he knew and would find the strangest hiding places that day and fight all the way into the carrier and out. Cat a would purr and brush against the vet, happy to see new people.

Taking medicine...

It wasn't that cat b wasn't chill or happy to be around people or anything, he was a big softy, really. But I can't think of much that cat a complained about.

Being ignored.

Kitty kisses!! I always get a stiff paw to the jaw when I go in to steal some...

Cat 1 - being picked up. Usually makes him very squirmy.

Cat 2 - being petted when she didn’t initiate affection.

Cat 3 - interacting with cat 1, she doesn’t like him, especially not in close proximity, which he hasn’t picked up on despite her hissing and smacking him regularly for the last seven years

One of our cats is called Loki. He's scared of thunder.

Citrus. He is genuinely offended if you offer him an orange

One of my cat dislike it when i touch his foot and tail and thigh too much, so i proceed to touch his foot and tail and thigh so much that he will start to bite me.

• Camouflage (as in items of clothing with the pattern)
• Tall boots
• The color red
• When you open a plastic bag, such as for garbage (but if they’re left lying around he loves to sit on them) - this doesn’t apply to treat bags
• Tall men with deep voices - roughly 6’3” (1.9m) or taller

The vacuum cleaner. One cat gets really scared and freezes while the other starts hissing at the machine when I bring it out.

Storms

Strangers, especially ones who try to pick her up like a dumbass

It's a love/hate relationship with the auto-feeder.

Tummy rubs, unless my wife does it

Mother's cat hates everyone who is not my mother. She tolerates me enough to let me medicate her (she might like me)

The kitten is terrified of my twin. My identical twin. Kitten likes me. Kitten lets me pick her up and kissy her. My twin? Scariest fucking thing ever.

Fireworks and thunder

Sounds.

Non consensual belly rubs

Cheap cat food. She turned her back on it, made scratching motions as if burying shit, gave me a "look" and stalked away.