anyone know where I can buy a lifejacket for horse? he loves the water and likes to think he can swim, but definetly can't... so, i'm looking into buying him a lifejacket so that he can be safer in the water. we have a great big stream near our house that horse and my son love to play in together, but I am always so nervous with horse in the water, i think a lifejacket would be a good idea, I would always be with the boys and watching them of course! thank you