I've started this route in Adderbury Village where there is plenty of on street parking.
Relatively flat but there are a couple of stiles to navigate, in wet weather they can be a bit waterlogged as well. Very well signposted, clear pathways.
A couple of stream access points suitable for dogs to have a paddle and a play in, and as you can see from the pictures there are some seasonal water features.
Plenty in the village of Adderbury.
Adderbury Village has a trio of pubs, The Bell, The Coach and Horses and The Red Lion, all accessible from this route and all dog friendly. There is also the lovely cafe Harper's which always welcomes dogs and has the most delicious cakes, and a great cooked breakfast, highly recommend (https://www.instagram.com/harperscoffeehouse).
There are plenty of off lead opportunities on this walk but there can be some cattle grazing in the fields, but there are always sign pre warning of this and they aren't along the whole route. There are sometimes horses in one of the fields as well but they tend to keep themselves to themselves. In the wet weather and winter months this route can also get extra muddy so take your wellies.