Besides our Daisy we have a 155 pound St. Bernard & a 98 pound Collie. Both are great with her and love her. Both give her lotsa kisses which make her a soaking wet mess! One thing we watch out for is that when the big guys get excited they don't realize they can easily step on Daisy so we are sure to pick her up out of the way.
Raise them together and they should be fine. Good Luck!