I was wondering if keeping multiple T slings next to eachother, separate enclosures of course...does being able to see eachother stress them out at all? We keep horned frogs in tanks with painted dividers because of this.
Tarantulas are practically blind and don't rely on sight. They rely on their other senses. Feeling vibrations and the air flow is how they detect things. Having slings next to each other won't stress them out. They are in their own little environment in their enclosures and wouldn't be able to sense the other spiders movements or anything else.