We have 6 girls in the backyard,in a fenced run that has an indoor coop. We have a stray girl (different breed)that has been in our yard from sun up to dusk for the past week. She looks healthy,comb & wattle are bright,feathers nice & clean. We can't find her owner,so we have her enclosed and across the yard from our girls. Our local vet says a checkup or health screen is about $140.00 and/or she should be isolated for 2 weeks. Does this sound right? We got our girls almost 2 years ago and we have not had anyone look at them. Should we have everyone checked out? Should we wait a few days and try to mix the stray with our girls? How much of a risk are we taking if we don't take the stray to a vet?