When there are so many issues in our country, we just brought up the issue of "touching dog". I do understand from my muslim friends that they should not touch the dog unnecessarily as per their religion.
But, it's as per individual practice and belief. In a democratic country, you can touch any animal so long they don't bite you. Should you feel that you have touched something wrong, then just wash your body and say out the prayers.
If that's the case, then our PDRM also should not use dog.
Sometimes, we can't let our belief to go above our head.