Pinworm, separate?

[usernamepending]

Have found pinworms in tbs poo the past couple of days, but couldn't get hold of any wormer until today. He's in with two others (all three mine)so going to worm them all for pinworm tonight. There normal field has been on rest for the past month and they have recently gone back onto it, think this is where he's picked them up?

So do I move them back into old field until clear or just move TB as others show no signs? Or just leave as they are and clean all places he could have itched?

Forgot to add he was ridden in old field other day so could this also be contaminated now as well?

Any advice welcomed as they are horrid!

Thanks!

 

[Charlie77]

my friends new horse came with them. basically from what i read they should not go back on old grazing for 3/4 months. because the eggs will re contaminate if ingested.