9th
A couple of questions first:
1) What was he being fed before he came to you? And have you changed it?
2) Was he being turned out before and is he still?
3) Have you clipped him recently?
If you have changed his feed at all even just the brand it can affect some horses :rolleyes: Also now the weather is getting colder it can make them a bit sharper especially if you have clipped him out recently.
The only other thing I can think of is if he is on reduced turnout to what he is used he will have more energy to play you up with :rolleyes:
I would maybe suggest reducing his hard fed slightly and increase his hay and see how he goes but I would expect it to take about 2 months for him to settle down but about 6months to a year for you and him to "bond" properly.
HTH
Tracy