I have 4 pot belly pigs and one sulcatta about 35lbs. One of my pigs spends all day with my tortoise. Her pen is made of 12x12x16' boards so my pig just jumps in. They spend most of the day with each other and the pig will usually sleep in her house. there seems to be no stress on the torts part at all. Even when I let her out to stroll around they still stay around each other. All the pigs are very friendly and trained. Anyone see a problem with this. Thanks Jay