Hi, yes this is very normal. I also have two EB's, they are siblings and litter mates, male and female. They just turned 2 in February, and for the most part are starting to settle down more when they are together. When they were puppies, they did exactly the same thing when they were together. They would play rough with each other, and chew on each others legs and ears, they would do the typical bully Ram, and smash Into each other, and play tug of war with their toys. They do settle down and outgrow it, but you can reduce the horseplay in the house, by taking them to the park and letting them run off steam outside. We were lucky enough to live behind a nature trail and park, and we would take our guys to the park early in the morning, and in the evenings when it was cooler out and let them loose for a run for 15 or 20 minutes twice a day. They got to play together, chase a ball, and get rid of their energy, so when we were at home they were tuckered out, and would lay more with us than they would play.