Post a pic if you can.
What is the weight & length? Is it a male or a female?
A 7 year old coastal should be HUGE.
For instance, all of my coastal adults are 400 grams. My biggest rosy is a Limburg albino female that I weighed yesturday. She is 743 grams(or over 1.5 pounds!)
Hoppers are way too small for a FULL grown coastal.
I feed mine 40-50 gram young rats(don't go much higher, as there is a regurge potential) once every 5-7 days.
Keep us updated!
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Thanks,
-JC
www.rosyboas.to

40 plus rosies
0.1 Boa constrictor
1.1 cats(bengal & bengal mix)