Our dog (several years old at this point) sometimes puts her mouth around the edge of her bed and kneads it with her paw. Clearly a nursing behavior. We got her

Our dog (several years old at this point) sometimes puts her mouth around the edge of her bed and kneads it with her paw. Clearly a nursing behavior. We got her as a rescue so with her unknown history, it may be leftover behavior from an early separation from her mother.