I have a 5 month old named Grace and a 1 year old silky terrier named Teddy. I've had Teddy since the end of January and Grace since the end of November. Grace has never really liked Teddy but only hissed when he would come near her. However, lately she has started picking on him. He has always tried to play with her and she just hisses but now she'll run up to him hiss and run away. She will even go over to one of his treats on the floor and lay down right by it or put it in her mouth like as a challenge and when he tries to go for it she'll hiss at him. So it kind of seems like she is playing/pestering him but I can't tell if she really is playing or actually upset. Should I try to stop it or just let it play out? The dog doesn't really seem to mind the hissing or anything and has never acted aggressively towards her. I also have a 1 year old cat that pretty much just ignores hte dog and Grace gets along with her great. Your opinions are appreciated