In case anyone hasn't found it:
viewtopic.php?f=74&p=198#p198 = Grazing Animals Project a comprehensive guide to the use and effect of different grazing animals inc pony breeds
We took a mid Sept hay cut, to give all the August flowering species a chance to seed. We had Exmoor ponies from mid November to end February on 5 acres. The 4 ponies ate the Sept/Oct grass regrowth down very hard. By mid Jan, there was very little vegetation showing, and 2 ponies were moved on.
Lessons learned and observations:
1. The ponies ate down rough old cocksfoot tussocks, though they preferred any shorter sweeter grass. In January, they browsed scrub hard, and trod down the dead flower stem litter, and nettles, and molinia litter from the autumn. They did not eat any bramble, nettle stems, or dead grass litter or flower litter.
2. We will have 2 not 4 ponies next year so that the vegetation is not grazed down quite so hard in future and there will be more diversity of sward height - though it will not hurt for this one year as it has given plenty of new bare earth.
3. Fencing has to be really really robust - they will test it and will find the slightest weakness. This was because they wanted to eat the untouched grass on the other side, not because they were bored or escape artists. They are apt to put their head through any gap between 2 top rails/2 high tensile wires and strain forward to reach the greener grass on the other side.
4. Electric pony fencing is useless for these ponies - the ponies just put their heads down, and lift the tape up over their necks, insulated by thick manes, and walk through. They did not chew any rails.
5. Native ponies "do" really well. They "balloon" on the merest hint of good grass. Their owners will be most concerned that the ponies do not remain fat by spring as this is a precursor to laminitis, a really nasty painful foot disease caused by overweight plus spring grass. The owners were delighted to be offered winter, as opposed to summer, grazing. Winter grazing is in short supply.
6. Devon Wildlife Trust (Simon Berry) has been most helpful. Simon advised us to make sure the ponies were removed by March to allow the land to recover. This also suited the owners. Ponies will graze off any yellow rattle seedlings.
7. Make sure any precious scrub/hedgerow plants/trees are very well fenced off. In January, a holly was stripped bare, and they ate the branches (not the leaves), a young Scots pine was demolished despite what we had thought was sufficient protection. All the hedgerow branches within reach were eaten.
8. Similarly to David, we had minimal poaching. 3 of the 4 ponies were unshod, and they have dainty hooves. These were riding ponies on their annual break so they didn't charge around much at all. We were advised by DWT not to worry about poaching and the bare earth, as they would tread in the yellow rattle for us.
8. I did remove the dung from November to mid December, and after that the land was far too wet to take machinery on. In fact the small tractor and trailer made far more mess in the gateways than the ponies did. Removing dung from 4 ponies is hard and heavy work. Birds are scattering the remaining dung now, and we have considered lightly harrowing to spread it. However I sowed yellow rattle last autumn for the first time, and by the time the land will be dry enough to harrow, the rattle seeds which have survived waterlogging over this wet winter, if any, should have germinated, so I do not want to destroy the seedlings, and will do some light raking of the dung instead.
9. Ponies need checking every day. The Exmoors do not need extra feed or field shelters. They were very quiet and self contained, and an absolute joy to have around.
10. The ponies are owned by the Moorland Mousie Trust, at the Exmoor Pony Centre, who may have other ponies available.
http://www.moorlandmousietrust.org.uk/
11. Update: I have been advised not to allow the ponies onto the wettest areas in winter, as the poaching encourages the sharp flowered rush to spread. On wet land, aftermath grazing in the autumn is much to be preferred.
(Of course it all depends if you can borrow the grazing animals at that time. We cannot. Therefore we are having a reduced number of ponies between mid Nov and end Jan again because that is the only time we can get them. We'll be cutting the sharp rush next summer more often and possibly spreading some fleabane rhizomes and seeds over that area to try to compensate. Management in future years may be different, but this year we were unable to cut our grass for various reasons, so we need the ponies to pull out the tussocks. As someone once said somewhere, I think it was on the MM facebook page, words to the effect that it is not the end of the world if one year's management goes awry.)
Update Jan 21 - Plantlife's revamped Meadows Hub website has advice on grazing:
https://meadows.plantlife.org.uk/3-main ... h-pasture/