(1)> Overfeed it (this could make it overweight)
(2)> Shout at it (this will frighten it)
(3)> Hit it (this is abusing)
(4)> Try to sit on it (this could make it never
walk again)
(5)> Leave it in a room on its own for more than 3 days (this could starve it and confuse it)
(6)> Put a lead on a cat (it will annoy it and it will try to bite you)
(7)> Leave it outside for more than 5 hours (this could make it run away)
(8)> Not take it the the vets when it has a injury (it could cause to bad infection)
(9)> Not take it to the vets when its limping even if it's a minor injury (take it the the vets just incase it needs some injections or something)
(10)> Try to pluck hair off of it (this is terrible and could really hurt it)