We have two dogs, the first we got when she was a puppy and she is now just over 1. The second we rescued from someone and she is perhaps 4. Personality-wise they are very different, the younger is very lively, very active and a pain in the neck a lot of the time! The older is slower but very docile. They both get on brilliantly with the children, when they are on their own with them. As soon as both dogs are there and either the dc or me are around the younger one won't let the older one near us, to the point that it has erupted in a few quite viscious fights. I can't let it go on like this as I'm worried a fight will break out when I am not there to split them up and they may be near the children. Any suggestions as to how to resolve this?