I have a 10 month old springer/brittany mix puppy (Riley) and a 10 week old kitten (Elliott). They play together under supervision, of course, and can get quite rough, and they both love it. Although I think sometimes Elliott is the rougher of the two. The problem is I recently brought home a stray kitten, probably about 5 weeks old, and Elliott wants to play just as rough with the kitten as he does with Riley. You notice the kitten does not have a name yet, I am not sure yet if it has a home somewhere else or if things do not work out here I may have to find it another home. The kitten has only been here for 5 days and is quite small compared to Elliott. Is he just trying to show his dominance or could and would he possibly really hurt the kitten? I keep them separated for now. They will eat together but as soon as Elliott is done eating he jumps on the kitten. Is Elliott being aggressive because he plays so rough and tumble with Riley?