Has anyone out there had an American Mastiff for more than a year and then brought a couple of adult cats in the house? How did it go? How did you go about making the transition? If they are supposed to be gentle giants, would that mean they wouldn't initially want to hurt the other animals coming in? Also I believe this is due to lack of training and still not being fixed as he is 18 months old and not intelligent as others are saying their AM are. He gets some of the basics but other than that he still gets into everything he shouldn't, barks a lot and at...well everything. Any advice?
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