Well in emc i have tamed Ocelots and wolfs, that i sit them in my lot, about 5 mins later there not sitting anymore and follow me around, it is very frustrating.
Because they love you that much lol, but really i had this problem i had to egg them then start over to fix it
It has been like this for me too, at least 20 dogs and 5 cats have died from when they spawn into someone's res and they kill them for no reason.