ANSWER:

If you touch a pig, this doesn’t require washing your hands as this is not najis externally.

The dog is also not najis except for its saliva and the wetness of its mouth and nose.

Nevertheless, no one in his sound mind would touch these two animals or play with them! 

Can we touch dogs and pigs or they are also najas externally

Halal/Haram Matters, Purity |