hi, i weighed my carpet snake [adfult male] at the vet today and looked at his last owners records. he was 4.4kg last weigh and now 4.6 kg .only 200grams gain in 10 months. is that bad? hes on large rats, 2 per 2 weeks, is he getting enough or not please? should i give him bigger dinners. how much should a meal weigh and how often, e.g 500gram meal each week? or 1 kilo meaL each 2or 3 weeks? soz all q's. thanks.