Queries to another in house agent

Go for it, if they don't want you to do that they will say so. You have nothing to lose anyway.

It depends on the agency. Some say a no from one is a no from all (they often share "close but not for me" queries with each other), and some say go ahead. Just wait a few months so it doesn't feel like they just got the query and toss it out thinking they already saw it. Also remember that in many agencies, one person handles all incoming queries for all the agents and gets them to the appropriate person. Queries that don't make the first cut don't even get to who they're addressed to.

Check their website and see if any of them blog. It's likely they've answered that question somewhere.

I've queried two different agents at the same agency (months apart), and received full requests from both. There's good advice in the above posts. Do your research!

I say go for it anywhere, and if they are a "no for one and no for all" agency and they notice (I bet you they won't) then they can say something. But more likely you'll just accumulate R's from individual agents.

If you get a request for more, then they might notice as they might share those more often than they share queries.

But if your skin is thick enough to accept a possible rebuff, nothing to lose.