I have two cats. One is a small female and the other is large male. I also own a rottweiler. Everyone seems to get along really well except for when it comes to feeding time. My large male goes up to my rottweiler and chases him from his dog food and then eats it. Is this a behavior problem? Is he missing something in his diet? He also eats his own cat food. My rottweiler is now afraid to eat his food. I have to protect him from my cat! What should I do about this problem?