Can I get some suggestions on my puppy(6 mths)interacting with my senior(7 yrs) dog. We've had the puppy for a month and my other dog still wants nothing to do with her. She growls at the puppy when the puppy comes near her. We just started to try going for walks together so I have to see how that progresses..I didn't think it would have been like this because my senior dog usually is a very gentle easy going dog. Is she jealous ?