For a stall with a concrete floor, rubber stall mats are recommended to provide cushion and reduce concussion on the horse. Heavy bedding is also recommended to further increase the shock absorption of the flooring. If you do not add rubber mats and heavy bedding to concrete stall flooring, any horse will become stiff and prone to lameness. Be sure that the stall mats fit well in the space to prevent slippage or movement. The mats themselves can be slippery if there is not adequate bedding for absorption of urine.
You may have drainage issues with the concrete floor if it has not been set up for animal housing. You will have to deal with this every day in order to maintain a clean, dry stall.
Since your horse is older and may be experiencing difficulties in movement, we don't recommend keeping this horse stall-bound at all times. Daily exercise is needed, even in a small turnout paddock for a few hours a day so you can maintain the horse's flexibility and condition.
