In many of the pictures, the colouring or clothing that the animal is wearing is a sign that it is sacred, or very valuable to the owner. In other cases it is for identification purposes, trying to work out which sheep belongs to which farmer for instance. For others still it is just for festivals.
The various pictures of elephants which are highly decorated are just for festivals - in ordinary day to day life they will not be painted - I've been to India twice, and have seen the temple elephants, and elephants used like cart horses. None of them have been decorated.
The oxen who have their horns painted are not in any pain or discomfort - it's like us painting our nails in a way.
I also know that many people here go and buy clothes to dress their dog up in (parka coats for a dog!?!?!
) and whilst I think it's a waste of time / money, it's not cruel.
I also fail to find any cruelty in this picture:
Then again, I do feel a bit sorry for this one:
as it looks like it is obstructing his vision.
Not a personal attack or anything, I just think that you have to look past the colours and cloth and see that it actually isn't causing the animal pain or distress.