450 grams is a little on the small side. I like to see males at 500 to 700 grams in their 1st year, a 3 year old male should weigh anywhere from 1000 to 1500 grams or more. If you're feeding it mice, try switching to rats.

If you have more questions feel free to call me at 408-981-6694

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Brian Gundy

www.for-goodness-snakes.com