Also something to keep in mind that a 15-week-old puppy's bladder isn't even close to fully developed. My youngest girl couldn't hold it more than 4-5 hours until she was 11-months-old. After she quit growing height-wise, her bladder caught up with her and she's been fine ever since. My oldest female was totally reliable by 5 months.
Both are the same way about the rain too
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