Couple questions here. It sounds like UB has a long tail. Could this be a possible problem, with constant irritation or source of infection by covering the vulva? Maybe tail is in the way of ram trying to breed her? The only sheep tails I remember are fat and heavy, storage areas to keep sheep going in lean grazing.
She might have gotten some dirt internally, when being bred by the ram. Being in a state of low-grade infection, could be preventing breeding or coming back into heat. I have seen that happen before with horses.
For commercial herds, tails are removed so they don't harbor nasty stuff or inhibit breeding. The tail can catch fluids, hold moist dirt that is a breeding ground for maggots after lambing. Real easy to introduce infection into the ewe with a dirty tail.
So these were thoughts I had when reading UB did not get bred.
Are you selenium poor in your local area? We are here in MI, so added selenium is a must for good breeding and cycling of the reproduction systems. My main experience is with horses, and lack of selenium with Vit E, can cause MANY issues, one of which is the reproduction cycle. I have made sure my heifer got extra selenium in her handful of grain, because the grazing and locally grown hay will not provide it to her. Sheep around here get the White Muscle disease shots to ensure the bodies contain enough Selenium to survive lambing. Lambs get WM shots after birth to prevent the problems happening.
Horses require the added Vit E to absorb the selenium, so my heifer and our market lambs get that kind of selenium. Not sure if they really need the Vit E as well, never thought to check up on it!
Anyway, some ideas for you to contemplate regarding her barren state.
She might have gotten some dirt internally, when being bred by the ram. Being in a state of low-grade infection, could be preventing breeding or coming back into heat. I have seen that happen before with horses.
For commercial herds, tails are removed so they don't harbor nasty stuff or inhibit breeding. The tail can catch fluids, hold moist dirt that is a breeding ground for maggots after lambing. Real easy to introduce infection into the ewe with a dirty tail.
So these were thoughts I had when reading UB did not get bred.
Are you selenium poor in your local area? We are here in MI, so added selenium is a must for good breeding and cycling of the reproduction systems. My main experience is with horses, and lack of selenium with Vit E, can cause MANY issues, one of which is the reproduction cycle. I have made sure my heifer got extra selenium in her handful of grain, because the grazing and locally grown hay will not provide it to her. Sheep around here get the White Muscle disease shots to ensure the bodies contain enough Selenium to survive lambing. Lambs get WM shots after birth to prevent the problems happening.
Horses require the added Vit E to absorb the selenium, so my heifer and our market lambs get that kind of selenium. Not sure if they really need the Vit E as well, never thought to check up on it!
Anyway, some ideas for you to contemplate regarding her barren state.