Question: What was Brian talking about with the sheep over in Scotland after he found out about the schools' plan?
Question: Why is Tony was so chatty when Seth Gold tried to tell him something or ask questions?
Answer: He repeatedly warns him against using the universal remote for bad purposes. However, Seth, blinded by remote's abilities, completely ignores and disregards Tony's warnings and uses the remote when and how he pleases, which eventually turns against him.
Question: Were there any hints that CJ was the spy before he reveals himself to Brian O'Conner at the end of the episode?
Answer: No, nothing foreshadowed his true colours.
Answer: He is referring to Dolly the sheep who was cloned.