I have a 4 month old puppy. The other dog that lives in the house is 4yrs old. Both are males. Older one is fixed. The older dog is trying to have intercourse with my puppy. It's not humping because there is well, not sure what all I can say on here...but let's just say I'm very concerned my puppy is gonna get hurt. I try and keep them apart as much as possible. But the older one is relentless. And is attacking my puppy all the time. Any suggestions?