Well, I would think it would be to get all the germs off of the dog so that there is a lessr chance that someone in the house will get sick. Also, the rain could get the dog sick, and if you let the dog back in without cleaning it, someone in the house could get sick. I assume that you probably care about your dog, so this is most likely done for the care and safety of your dog. There is absolutely nothing wrong with doing what you're doing. It is probably just done for everyone's safety.
A general diploma intended for college and applying for a job
Here are two of the four letter words utilizing those 4 letters in a combination that immediately come to mind.
1. grin
2. ring
I’m not sure what context this is in, but women is a group of females who are generally adults and aviation is to do with flying. Hope this helps.
Goal is to aim for something high