Our rottweiler, Domino, is 16 months old, and is the most tempermental dog we have ever had!!! She is worse than a hormonal teenager. We have had her hormones checked, had her on estrogen, changed her food in case she had an allergy - and she still has her moments. She is not aggressive toward humans and she is very loving - but she "grumbles" as someone pets her and it scares the crap out of everyone...I used to get nervous when I would hear her doing it with our 9 year old daughter, but it is how she talks. Because she "grumbles" all the time, when she is around other dogs, she just sounds mean - she does try to dominate, but not aggressively (although we have a 10 month old saint bernard that Domino just tortures when they are in the yard together - Zulu does not seem to mind, so I know she is not being hurt, but neighbors will come over to say that Domino is "beating up" Zulu because of how Domino sounds). We also have a 17 month old rottweiler mix that we rescued and, except for the occasional mounting (that would be Domino, the fixed female, to Foster) she seems to accept him alot more.
Any ideas? Domino is a beautiful dog and very outgoing, but I get nervous taking her out in public, because she likes to be pet, but then when she starts "talking", it makes people (and me, because I do not know the people) nervous.