I always usually say a "thank you for reading" even though they declined if on a partial or full. If just on a query, I don't respond. That would be too much work and I don't think it's necessary.
But when they are rude, like say for instance, they ask for a full, then send you a Dear Author post card...then I don't say a word. If they are going to be that cold (like I have gotten in the past, that example I mentioned and everything) then I'm sorry...they ain't gonna get a "thank you for reading" out of me. And like Always said, I wouldn't query them again on a different ms. No Thanks.
But when they are rude, like say for instance, they ask for a full, then send you a Dear Author post card...then I don't say a word. If they are going to be that cold (like I have gotten in the past, that example I mentioned and everything) then I'm sorry...they ain't gonna get a "thank you for reading" out of me. And like Always said, I wouldn't query them again on a different ms. No Thanks.