Thank you sis Syilla for all the links, it is very interesting to learn about the view of the other imams. I never knew that Imam Nawawi consider you don't need to samak if you touch a pig.
I agree with north_malaysian, we don't need to stick to one madhab provided we know and learn about other madhab as well. just like we taklik to madhab Hanafi or Maliki when it comes to wudhu' when performing hajj. MasyaAllah how beautiful Islam is.
MasyaAllah, the different opinion by the madhabs or khilaf actually provide many ways to settle even my small issue.
Logically if my dog lick my hand and even if I wash with only soap and water, the item ie. saliva is not there anymore , thus, I still need to samak my hand. But when it come to touching other object, although I haven't purified in the proper way, it doesn't make my hand equal to najas as a dog's paw.
Thank you for your advice, I learnt a lot about najas and I learn a lot more about the view of other madhab.
One inetersting subject I realise, is many advice says it is not permissible for muslim to keep pet dogs. My knowledge is shallow, but I never come across, that it is haraam to keep a dog as a pet. Is it? I agree we should not for obvious reason but is it haraam?
Just bare in mind that islam is easy and not to troublesome ourselves.
Yup, I keep that in mind all the time when I face puzzling question like this. Thank you Syilla, Sabeeha, north_malaysian and everybody for all responses and advise.