Shires Aviemore De Gogue Training Aid in Black. The Shires De Gogue Training Aid is a versatile training aid that can be used for in-hand, loose schooling, lungeing and ridden work. The De Gogue encourages hollow horses to lower the neck, bring in the nose and engage the hindquarters. The De Gogue acts upon the poll and the bit, putting pressure on the corners of the mouth when the horse raises his head higher than desired. Downward pressure is placed on the poll and backwards pressure on the mouth, which releases when the horse brings his head down and nose in. Read more… When used correctly the De Gogue can help develop suppleness through the back, encourage a longer, lower frame while being ridden, develop muscle across the back and loins - particularly those needed for show jumping, strengthen the hindquarters and also help develop looseness in the paces due to greater suppleness in the back The De Gogue is made from Aviemore quality leather with stainless steel fittings.