How to politely ask your mother-in-law not to bring her dog to your parent's house?

You don't have to go out of your way to avoid "hurting her feelings", its a normal expectation to not have her dog accompany her, regardless of whether she wants this or not.  You simply tell her that she'll need to either make other arrangements for her dog, or that pooch will have to wait in her car, since dogs aren't welcome in your home. No explanation needed other than this. Woof. (This is your 1,287th answer!  I can imagine that you must worry about all sorts of other things, as well.)

Tell her "Mr . and  Mrs . Smith don't allow animals in their home, so you'll have to leave Rover at home !" .

Politely tell your husband that he needs to tell his mother that she can't take that DAM DOG of hers to your mothers', it is rude to assume that it will be okay to carry it.

Don't ask her, TELL HER!

"Please leave your worthless sh*t- eating ankle biter at home or I will punt it around my house".

Just tell her the truth......NO animals allowed.

I think it's something your mom will have to give in on.  If the dog is important his elderly mom and your mom doesn't like dogs, she needs to deal with it, especially if it will hurt her feelings.  It's only once a year.

Your husband needs to talk to his mother about this. 

i would let her bring it, dogs are cute

your HUSBAND needs to flat tell HIS mother that NO DOG ALLOWED...... as politely as possible.... but NO EXCEPTIONS.......... if his mother can not accept just basic manners..... she can stay home...... but it is your HUSBANDS responsibility to deal with HIS mother

Tell her don’t bring her dog because your mom doesn’t like them.