I have two 5 week old banty chicks. I believe they are silkie crosses. I have them in a small tractor and have been moving them out into the yard during the daytime. They seem to be pretty well feathered, and I know my big girls were outside at this age, but they seem soooo little! I'm in northern california, so my temperature is mid to low 50s at night and high 50s to low 60s during the day. I'm thinking about moving them outside and letting them have a heat lamp at night. They have been sleeping without one in the house for the last week and dont seem to have any problems. Suggestions???