I own a 3 year old male Rottweiler named Chewy, who is fixed. Currently we live at home with my dad's Husky Nikki, who is 11 (and we used to also live with another Rottie who died last summer). My long distance boyfriend owns a 3 year old male boxer (Harley) who is NOT fixed. I hope to in the near future have them meet and also live with my boyfriend in about a year's time. I'm concerned about the way they might react (and I know my boyfriend does not plan on fixing Harley)...what can I do to help this situation?