while we had a gilt farrow had two then nothing left her for a couple of hours, so rang vet sorted out fo them to come out put put phone down to see her pop another out so rang and canceled vet ,she then had another 6 at 45 minute intervals ,how long do you leave it before ringing vet ,also the piglets won't use the creep /heat lamp all pig lets ive had before have gone straight under heat lamp