Misty is lame

Arriving I have the feeling not all is well with Misty .Tam says she is lame and I guess she really was not feeling to good the last time I rode her and I feel guilty about that .Tam suggests I have Trigger who can be a bit naughty at times but I love him all the same.The two dogs Maisie and Tilly are hounding us for treats and Tilly tries to follow us but we send her back.The ground is wet and muddy but we do not mind that and they both go well all though trigger did veer off to the right when cantering on top.The wild ponies only glance at us now and just stare in amusement if horses could do that.we make our way back along the treasure trail at full canter getting splashed with mud,it always seems more fun if you come back muddy and tired out.At least it is not snowing or gales blowing .Trigger was not to bad but not as comfy as Misty but he does canter well.