Can somebody please explain this to Roo??

She came in for a week because she was footy and I didn't want another lami bout. I then started to let her go out again for an hour with the plans to up it again over a couple of weeks... Roo has other plans.
When I turn her out she just stands there, and if she sees me she whinnies and walks back and forth across the gate way. Even if it's only been 10 minutes.
Yesterday I turned her out while I lunged Jimmy, she stared at me and whinnied the entire time.

Today I decided to let her have her muzzle off for an hour. She can't yet go a full day without it but an hour, OK.
She did go and eat some grass and seems happier but just under an hour later she was ready to come in.

This is going to be a long winter!!!