LindaVass

my working cocker has started to growl when she is in her bed at night if approached. Its a kind of submissive growl as she rolls on her back when doing it. At no time has it felt aggressive. This only happens at night where she has her bed next to mine. I have another older dog who has never attempted to oust her from the bed. My cocker is 2 and a half years old. Any explanation or tips to help Thanks Linda