I got 4 portable electric pens for Christmas. My dad is going to show me how to set them up, and move them today. We have a lot of honeysuckle and Yo-pine and grapevines that the goats can eat. Do we need to be careful putting them out for just a short while today, then a bit longer tomorrow so that they won't get sick? They have eaten most of the browse in their permanent pen, so we have been cutting bamboo and yo-pine for them every day.