I think you need to sit down with him and both of you maturely and calmly discuss your concerns and feelings. Communication is important in relationships and it seems like he may be feeling or worrying about things that he's not voicing to you. I think that talking it out will help because for now you can only guess why he wants you to get rid of your animals. What are his concerns with breeding? and you can explain to him why you want to breed these animals.