MIL mad and refusing to come see grandchildren because of new puppy?

i get emails from lots of websites like what to expect.com and other preg websites you know how they give you little bits of info and week by week baby updates throughout your pregnancy well anyway i got one stating that it is healthy for children to be around dogs not cats just dogs they said the dog helps boost a babys immune system exposing children at young ages to dogs helps prevent allergies not only to pet dander but household dust and with the dog goin in and out to potty they also expose ur child to ouside allergens in little tiny evels but this is healthy its like an allergy vaccine in a way like a flu shot where u get a little to boost ur immune system to prevent the full blown flu well its like that with allergies trust me i was ecstatic to hear this news i hbave a yorkie poo and a baby on the way and she loooves kids so i was soo happy to get that e mail but i would look it up like pregnancy center or what to expect .com