I am not and refuse to be a vegatarian, however when it comes to treatment of animals there is a difference nowadays.
Jews do NOT usually raise animals anymore. Most animals are raised by goyim or chicken farms, The animals are then brought to auction where they are bought by meat packers including kosher packers.
They are then schected and processed according to kashurth.
However from the time are born until the time they are sold, Many times they are mistreated. Chicken Coops are overcrowded and hens peck at each other. Bovine(Cattle) are feed bovine parts when Bovines are herbavores (They eat plants) thats how Mad Cow disease got spread.
In previous generations Jews generally bred and raised their own animals
(I am only referring to the United States, I am not sure what is done in Israel)