I heard that if even a single hair of a Carnivore animal(even a cat) or one died in a Haram way be on your clothes; it will make your Salat not acceptable, any confirmation with references please?
In Shia Jaafari feqh:
ِA single hair of an animal which is forbidden to eat in Islam cause to making your salat unacceptable and ALLAH knows..
Check this link, Marajeaa says that.
In order to pray you must be in a state of tahara (cleanliness). So wearing clothes or material that is najis would violate this state. This includes, but is not restricted to, skin that has not been tanned.
Animal hair is not considered najis (which includes cats), with the exception of dogs.
There is difference of opinion on dog hair. Most Sunni schools of thought consider the whole of the dog as najis, and so (knowingly) having dog hair on your clothes would require cleaning before you pray. The Hanafi school however only considers wet contact with a dog as najis (i.e. the dog's saliva) and it's hair as not najis.
There's nothing from the Quran that references to such a prohibition.
It would be tough to bring evidence for something that isn't mentioned in the Quran or sayings attributed to the Prophet.
The closest hadith i can think of is in Sunan Abu Dawud and Sunan ibn Majah about black dogs can break your prayer if they pass in front of you.
However, I don't know if the hadith falsely attributed to the Prophet or true.