Do you think the largest Pet Gear Play Pen would be enough room for 2 dogs to sleep and play in when I'm away from the house? I currently use the Pet Yard  and love it because you can buy extensions to make the play area larger. But, Belle keeps climbing out of it (with the help with the openings). I'm thinking the Pet Gear would be a good solution for this, but don't know if it would be large enough for a 12lb & say a 7lb dog.     |