Hi I have an 8 month old intact female Great Dane. I haven't seen her in near 3 months now due to my job. My roommate until a few days ago was watching her for me. Now she is at a friends house until Friday when I get home. Since going to friends house she has been unusually aggressive. He calls her Cujo now it is so bad. I haven't like really asked a ton of questions yet but it seems that it is only while she is in her kennel and she is only aggressive to his 2 children and his dog. He tells me that anytime they go within 15 feet of her kennel she goes crazy, growling, barking and such. She is fine with him and his wife. Also she is fine and even plays with his dog when she is not in her kennel the way I understand it. She has known all of them pretty much since I got her at 2 months of age so they are not strangers to her although she hasn't seen any of them since I left on July 13th until the couple days ago when she was taken to his house. Also before I left she had never displayed any aggression to any dog or person except for one time when one of the same friends children smacked her and a couple times towards his dog when his dog hurt her while they were playing. I have been doing some reading and at this time I am assuming that she is being territorial over her kennel due to being in a somewhat new environment to her. All the other times she has been to his house she was only inside for a matter of minutes and was never put in her kennel at anyones other than her own house.
Also I know this is the aggression forum but she has another issue I would like to address. I started leaving her out of her kennel at night and during the day when we were at work on June 30th. From then until July 13th when I left she had only 3 accidents in the house all of which were during the day while at work. She had zero accidents at night for those 2 weeks. Shortly after I left she started relieving herself in the house every single day while roommate was at work and every single night while roommate was sleeping. She also squirts a little bit when she gets excited or scared and scares very very easily. I don't understand why she scares so easily. I will admit that 2 times I got entirely too angry with her and made mistakes with her both times that I am still upset with myself about after 4 months.
Anyways if anyone has any ideas or needs anymore information please post. I gave all the info I can think of at time but I am sure more is needed. I am mainly concerned about the aggression towards my friends children because my roommate had a baby girl recently and if I can't get this issue fixed I will have to find her a new home and that is the last thing I want to do. Thank you to anyone who replies.