I have one of the large lookout carseats that you are looking at and then I also have a small console one for the front seat. All 3 of my dogs (Yorkie 5 lbs, Chihuahua 6 lbs, Jack Russell 10 lbs) fit in the lookout carseat but my chi (the princess does not like to sit that close to the puppies) and prefers the console car seat that I bought for my yorkie. My chi still doesn't really like my yorkie even though we have had him for 5 mths now. She growls nonstop at him so it is easier to keep them separated. I think there is plenty of room in the lookout seat for 3 if they all get along well. |