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If by "odder" you meant to say "odor" or "odour", then yes, there is a scent given off by cats in heat. It's uncertain whether it is the scent or the call that brings the males to the vicinity, though.
Odder RK was created in 1996.
"Odder trouble" does not have a specific meaning. It could be interpreted as a more unusual or peculiar type of problem or difficulty.
Odder, solder.
odder
the fan is working but no heat
stranger danger
stranger danger
stranger danger
stranger danger
stranger danger
Odder trouble could be "stranger danger" while hink pink could be "clue glue."